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<div class="title">/data/users/hoss/faiss/IndexIVFPQ.cpp</div>  </div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Copyright (c) Facebook, Inc. and its affiliates.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * This source code is licensed under the MIT license found in the</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;</div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">// -*- c++ -*-</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;</div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#include &quot;IndexIVFPQ.h&quot;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;</div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &lt;cmath&gt;</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="preprocessor">#include &lt;cstdio&gt;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &lt;cassert&gt;</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="preprocessor">#include &lt;algorithm&gt;</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="preprocessor">#include &quot;Heap.h&quot;</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#include &quot;utils.h&quot;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#include &quot;Clustering.h&quot;</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#include &quot;IndexFlat.h&quot;</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#include &quot;hamming.h&quot;</span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="preprocessor">#include &quot;FaissAssert.h&quot;</span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="preprocessor">#include &quot;AuxIndexStructures.h&quot;</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="keyword">namespace </span>faiss {</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="comment">/*****************************************</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="comment"> * IndexIVFPQ implementation</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="comment"> ******************************************/</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;IndexIVFPQ::IndexIVFPQ (Index * quantizer, <span class="keywordtype">size_t</span> d, <span class="keywordtype">size_t</span> nlist,</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;                        <span class="keywordtype">size_t</span> M, <span class="keywordtype">size_t</span> nbits_per_idx):</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;    IndexIVF (quantizer, d, nlist, 0, METRIC_L2),</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;    pq (d, M, nbits_per_idx)</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;{</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;    FAISS_THROW_IF_NOT (nbits_per_idx &lt;= 8);</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">code_size</a> = pq.code_size;</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#ae06049e4259edb47d443ef87bdedc744">code_size</a> = <a class="code" href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">code_size</a>;</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;    by_residual = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;    use_precomputed_table = 0;</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    scan_table_threshold = 0;</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;    polysemous_training = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    do_polysemous_training = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    polysemous_ht = 0;</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;}</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;<span class="comment">/****************************************************************</span></div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="comment"> * training                                                     */</span></div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;</div>
<div class="line"><a name="l00060"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#af6565a5d8bab7be3df19c50d235bd662">   60</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#af6565a5d8bab7be3df19c50d235bd662">IndexIVFPQ::train_residual</a> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x)</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;{</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a4e06f04853dcb424dc393de5f641e917">train_residual_o</a> (n, x, <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;}</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;</div>
<div class="line"><a name="l00066"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#a4e06f04853dcb424dc393de5f641e917">   66</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a4e06f04853dcb424dc393de5f641e917">IndexIVFPQ::train_residual_o</a> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <span class="keywordtype">float</span> *residuals_2)</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;{</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> * x_in = x;</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;    x = <a class="code" href="namespacefaiss.html#a14884d253128c7af5891a65082ad7dc6">fvecs_maybe_subsample</a> (</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;         <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, (<span class="keywordtype">size_t</span>*)&amp;n, <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#af265acf5aa1bcda60898002287e6a3d6">cp</a>.<a class="code" href="structfaiss_1_1ClusteringParameters.html#a993e0a035248faad6e292a5ef9af1953">max_points_per_centroid</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>,</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;         x, <a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>, <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#af265acf5aa1bcda60898002287e6a3d6">cp</a>.<a class="code" href="structfaiss_1_1ClusteringParameters.html#a509c65e2ebe6ecabebd163ecb03c5579">seed</a>);</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;float&gt;</a> del_x (x_in == x ? <span class="keyword">nullptr</span> : x);</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> *trainset;</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;    <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;float&gt;</a> del_residuals;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a>) {</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;        <span class="keywordflow">if</span>(<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>) printf(<span class="stringliteral">&quot;computing residuals\n&quot;</span>);</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;        <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> * <a class="code" href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">assign</a> = <span class="keyword">new</span> <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> [n]; <span class="comment">// assignement to coarse centroids</span></div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;        <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;idx_t&gt;</a> del (assign);</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;        <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">assign</a> (n, x, assign);</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;        <span class="keywordtype">float</span> *residuals = <span class="keyword">new</span> <span class="keywordtype">float</span> [n * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>];</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;        del_residuals.set (residuals);</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;        <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i = 0; i &lt; n; i++)</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;           <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#aaae77608bbda70b1098897e9167a82f9">compute_residual</a> (x + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, residuals+i*d, assign[i]);</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;        trainset = residuals;</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;        trainset = x;</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;    }</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;        printf (<span class="stringliteral">&quot;training %zdx%zd product quantizer on %ld vectors in %dD\n&quot;</span>,</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;                <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a>, <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>, n, <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a1e4056fa3938ed8c9fe701e90d94ad95">verbose</a> = <a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>;</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.train (n, trainset);</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9d5373633df7a9bec4de69400b9adeed">do_polysemous_training</a>) {</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;        <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;            printf(<span class="stringliteral">&quot;doing polysemous training for PQ\n&quot;</span>);</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;        <a class="code" href="structfaiss_1_1PolysemousTraining.html">PolysemousTraining</a> default_pt;</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;        <a class="code" href="structfaiss_1_1PolysemousTraining.html">PolysemousTraining</a> *pt = <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a2b14cbb5acb3fc28a4df8fde3f5567cd">polysemous_training</a>;</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;        <span class="keywordflow">if</span> (!pt) pt = &amp;default_pt;</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;        pt-&gt;<a class="code" href="structfaiss_1_1PolysemousTraining.html#a995374ba2f0bc2738edae72ca9142f82">optimize_pq_for_hamming</a> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>, n, trainset);</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    }</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;    <span class="comment">// prepare second-level residuals for refine PQ</span></div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;    <span class="keywordflow">if</span> (residuals_2) {</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;        uint8_t *train_codes = <span class="keyword">new</span> uint8_t [<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a> * n];</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;        <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;uint8_t&gt;</a> del (train_codes);</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#ae5a340ee5a4b1d35a565b167de2a2ef1">compute_codes</a> (trainset, train_codes, n);</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;        <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i = 0; i &lt; n; i++) {</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">float</span> *xx = trainset + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;            <span class="keywordtype">float</span> * res = residuals_2 + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;            <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (train_codes + i * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a>, res);</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j &lt; <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>; j++)</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;                res[j] = xx[j] - res[j];</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;        }</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;    }</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a>) {</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVFPQ.html#ad99c215aeaf92e995cb97f4044c4d267">precompute_table</a> ();</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;    }</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;}</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;<span class="comment">/****************************************************************</span></div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;<span class="comment"> * IVFPQ as codec                                               */</span></div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;<span class="comment">/* produce a binary signature based on the residual vector */</span></div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;<span class="keywordtype">void</span> IndexIVFPQ::encode (<span class="keywordtype">long</span> key, <span class="keyword">const</span> <span class="keywordtype">float</span> * x, uint8_t * code)<span class="keyword"> const</span></div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a>) {</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;        <span class="keywordtype">float</span> residual_vec[<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>];</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;        <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#aaae77608bbda70b1098897e9167a82f9">compute_residual</a> (x, residual_vec, key);</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a08b130e3a21f2699a4e3bbec121fb838">compute_code</a> (residual_vec, code);</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;    }</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;    <span class="keywordflow">else</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a08b130e3a21f2699a4e3bbec121fb838">compute_code</a> (x, code);</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;}</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;</div>
<div class="line"><a name="l00149"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#a1ae6cdd996bbd398fa4e87646c8f3ba6">  149</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1ae6cdd996bbd398fa4e87646c8f3ba6">IndexIVFPQ::encode_multiple</a> (<span class="keywordtype">size_t</span> n, <span class="keywordtype">long</span> *keys,</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;                                  <span class="keyword">const</span> <span class="keywordtype">float</span> * x, uint8_t * xcodes,</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;                                  <span class="keywordtype">bool</span> compute_keys)<span class="keyword"> const</span></div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;    <span class="keywordflow">if</span> (compute_keys)</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;        <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">assign</a> (n, x, keys);</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#aaeddd125680a8d5347c0b58565b6b511">encode_vectors</a> (n, x, keys, xcodes);</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;}</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;</div>
<div class="line"><a name="l00159"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#ae1fb0cc3051dec8e322a78c443f8fc9a">  159</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#ae1fb0cc3051dec8e322a78c443f8fc9a">IndexIVFPQ::decode_multiple</a> (<span class="keywordtype">size_t</span> n, <span class="keyword">const</span> <span class="keywordtype">long</span> *keys,</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;                                  <span class="keyword">const</span> uint8_t * xcodes, <span class="keywordtype">float</span> * x)<span class="keyword"> const</span></div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (xcodes, x, n);</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a>) {</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;        std::vector&lt;float&gt; centroid (<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; n; i++) {</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;            <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#aaef6f4132b1f390121ebb11058baf190">reconstruct</a> (keys[i], centroid.data());</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;            <span class="keywordtype">float</span> *xi = x + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>; j++) {</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;                xi [j] += centroid [j];</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;            }</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;        }</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;    }</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;}</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;<span class="comment">/****************************************************************</span></div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;<span class="comment"> * add                                                          */</span></div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;</div>
<div class="line"><a name="l00182"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#a981c2748bfbd9b018494f119279a0342">  182</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a981c2748bfbd9b018494f119279a0342">IndexIVFPQ::add_with_ids</a> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> * x, <span class="keyword">const</span> <span class="keywordtype">long</span> *xids)</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;{</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#ac0cb8421b9885d691696d2ff4f76894b">add_core_o</a> (n, x, xids, <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;}</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;</div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;<span class="keyword">static</span> <span class="keywordtype">float</span> * compute_residuals (</div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;        <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html">Index</a> *quantizer,</div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;        <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">Index::idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span>* x,</div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;        <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">Index::idx_t</a> *list_nos)</div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;{</div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;    <span class="keywordtype">size_t</span> d = quantizer-&gt;<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;    <span class="keywordtype">float</span> *residuals = <span class="keyword">new</span> <span class="keywordtype">float</span> [n * d];</div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;    <span class="comment">// TODO: parallelize?</span></div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; n; i++) {</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;        <span class="keywordflow">if</span> (list_nos[i] &lt; 0)</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;            memset (residuals + i * d, 0, <span class="keyword">sizeof</span>(*residuals) * d);</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;        <span class="keywordflow">else</span></div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;            quantizer-&gt;<a class="code" href="structfaiss_1_1Index.html#aaae77608bbda70b1098897e9167a82f9">compute_residual</a> (</div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;                 x + i * d, residuals + i * d, list_nos[i]);</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;    }</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;    <span class="keywordflow">return</span> residuals;</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;}</div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;</div>
<div class="line"><a name="l00206"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#aaeddd125680a8d5347c0b58565b6b511">  206</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#aaeddd125680a8d5347c0b58565b6b511">IndexIVFPQ::encode_vectors</a>(<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span>* x,</div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;                                <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *list_nos,</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;                                uint8_t * codes)<span class="keyword"> const</span></div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a>) {</div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;        <span class="keywordtype">float</span> *to_encode = compute_residuals (quantizer, n, x, list_nos);</div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;        <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;float&gt;</a> del (to_encode);</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#ae5a340ee5a4b1d35a565b167de2a2ef1">compute_codes</a> (to_encode, codes, n);</div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#ae5a340ee5a4b1d35a565b167de2a2ef1">compute_codes</a> (x, codes, n);</div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;    }</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;}</div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;</div>
<div class="line"><a name="l00220"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#ac0cb8421b9885d691696d2ff4f76894b">  220</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#ac0cb8421b9885d691696d2ff4f76894b">IndexIVFPQ::add_core_o</a> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> * x, <span class="keyword">const</span> <span class="keywordtype">long</span> *xids,</div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;                             <span class="keywordtype">float</span> *residuals_2, <span class="keyword">const</span> <span class="keywordtype">long</span> *precomputed_idx)</div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;{</div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;</div>
<div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> bs = 32768;</div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;    <span class="keywordflow">if</span> (n &gt; bs) {</div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;        <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i0 = 0; i0 &lt; n; i0 += bs) {</div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;            <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i1 = std::min(i0 + bs, n);</div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;            <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>) {</div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;                printf(<span class="stringliteral">&quot;IndexIVFPQ::add_core_o: adding %ld:%ld / %ld\n&quot;</span>,</div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;                       i0, i1, n);</div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;            }</div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;            <a class="code" href="structfaiss_1_1IndexIVFPQ.html#ac0cb8421b9885d691696d2ff4f76894b">add_core_o</a> (i1 - i0, x + i0 * d,</div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;                        xids ? xids + i0 : <span class="keyword">nullptr</span>,</div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;                        residuals_2 ? residuals_2 + i0 * d : <span class="keyword">nullptr</span>,</div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;                        precomputed_idx ? precomputed_idx + i0 : <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;        }</div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;        <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;    }</div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;</div>
<div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;    FAISS_THROW_IF_NOT (<a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a>);</div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;    <span class="keywordtype">double</span> t0 = <a class="code" href="namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb">getmillisecs</a> ();</div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">long</span> * idx;</div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;    <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;long&gt;</a> del_idx;</div>
<div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;</div>
<div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;    <span class="keywordflow">if</span> (precomputed_idx) {</div>
<div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;        idx = precomputed_idx;</div>
<div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;        <span class="keywordtype">long</span> * idx0 = <span class="keyword">new</span> <span class="keywordtype">long</span> [n];</div>
<div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;        del_idx.set (idx0);</div>
<div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;        quantizer-&gt;<a class="code" href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">assign</a> (n, x, idx0);</div>
<div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;        idx = idx0;</div>
<div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;    }</div>
<div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;</div>
<div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;    <span class="keywordtype">double</span> t1 = <a class="code" href="namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb">getmillisecs</a> ();</div>
<div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;    uint8_t * xcodes = <span class="keyword">new</span> uint8_t [n * <a class="code" href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">code_size</a>];</div>
<div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;    <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;uint8_t&gt;</a> del_xcodes (xcodes);</div>
<div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;</div>
<div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> *to_encode = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;    <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;float&gt;</a> del_to_encode;</div>
<div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;</div>
<div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a>) {</div>
<div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;        to_encode = compute_residuals (quantizer, n, x, idx);</div>
<div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;        del_to_encode.set (to_encode);</div>
<div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;        to_encode = x;</div>
<div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;    }</div>
<div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#ae5a340ee5a4b1d35a565b167de2a2ef1">compute_codes</a> (to_encode, xcodes, n);</div>
<div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;</div>
<div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;    <span class="keywordtype">double</span> t2 = <a class="code" href="namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb">getmillisecs</a> ();</div>
<div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;    <span class="comment">// TODO: parallelize?</span></div>
<div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;    <span class="keywordtype">size_t</span> n_ignore = 0;</div>
<div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; n; i++) {</div>
<div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;        <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> key = idx[i];</div>
<div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;        <span class="keywordflow">if</span> (key &lt; 0) {</div>
<div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;            n_ignore ++;</div>
<div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;            <span class="keywordflow">if</span> (residuals_2)</div>
<div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;                memset (residuals_2, 0, <span class="keyword">sizeof</span>(*residuals_2) * d);</div>
<div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;            <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;        }</div>
<div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;        <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> <span class="keywordtype">id</span> = xids ? xids[i] : <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> + i;</div>
<div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;</div>
<div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;        uint8_t *code = xcodes + i * <a class="code" href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">code_size</a>;</div>
<div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;        <span class="keywordtype">size_t</span> offset = <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#acd3e36cc06fc49e02773e403a84dba95">add_entry</a> (key, <span class="keywordtype">id</span>, code);</div>
<div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;</div>
<div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;        <span class="keywordflow">if</span> (residuals_2) {</div>
<div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;            <span class="keywordtype">float</span> *res2 = residuals_2 + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">float</span> *xi = to_encode + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;            <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (code, res2);</div>
<div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j &lt; <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>; j++)</div>
<div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;                res2[j] = xi[j] - res2[j];</div>
<div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;        }</div>
<div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;</div>
<div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;        <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a>)</div>
<div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;            direct_map.push_back (key &lt;&lt; 32 | offset);</div>
<div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;    }</div>
<div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;</div>
<div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;</div>
<div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;    <span class="keywordtype">double</span> t3 = <a class="code" href="namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb">getmillisecs</a> ();</div>
<div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;    <span class="keywordflow">if</span>(<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>) {</div>
<div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;        <span class="keywordtype">char</span> comment[100] = {0};</div>
<div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;        <span class="keywordflow">if</span> (n_ignore &gt; 0)</div>
<div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;            snprintf (comment, 100, <span class="stringliteral">&quot;(%ld vectors ignored)&quot;</span>, n_ignore);</div>
<div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;        printf(<span class="stringliteral">&quot; add_core times: %.3f %.3f %.3f %s\n&quot;</span>,</div>
<div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;               t1 - t0, t2 - t1, t3 - t2, comment);</div>
<div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;    }</div>
<div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> += n;</div>
<div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;}</div>
<div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;</div>
<div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;</div>
<div class="line"><a name="l00310"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#a921c6640d3a16bb3608883d8e8948810">  310</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a921c6640d3a16bb3608883d8e8948810">IndexIVFPQ::reconstruct_from_offset</a> (<span class="keywordtype">long</span> list_no, <span class="keywordtype">long</span> offset,</div>
<div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;                                          <span class="keywordtype">float</span>* recons)<span class="keyword"> const</span></div>
<div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;    <span class="keyword">const</span> uint8_t* code = <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#afc2760bed7c210f2fad9b03109f561ee">get_single_code</a> (list_no, offset);</div>
<div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;</div>
<div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a>) {</div>
<div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;        std::vector&lt;float&gt; centroid(d);</div>
<div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;        quantizer-&gt;<a class="code" href="structfaiss_1_1Index.html#aaef6f4132b1f390121ebb11058baf190">reconstruct</a> (list_no, centroid.data());</div>
<div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;</div>
<div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (code, recons);</div>
<div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>; ++i) {</div>
<div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;            recons[i] += centroid[i];</div>
<div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;        }</div>
<div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (code, recons);</div>
<div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;    }</div>
<div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;}</div>
<div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;</div>
<div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;</div>
<div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;<span class="comment">/// 2G by default, accommodates tables up to PQ32 w/ 65536 centroids</span></div>
<div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;<span class="comment"></span><span class="keywordtype">size_t</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a823ae6c4131996815fa4e90c7d1d13f6">IndexIVFPQ::precomputed_table_max_bytes</a> = ((size_t)1) &lt;&lt; 31;</div>
<div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;<span class="comment">/** Precomputed tables for residuals</span></div>
<div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;<span class="comment"> * During IVFPQ search with by_residual, we compute</span></div>
<div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;<span class="comment"> *     d = || x - y_C - y_R ||^2</span></div>
<div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;<span class="comment"> * where x is the query vector, y_C the coarse centroid, y_R the</span></div>
<div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;<span class="comment"> * refined PQ centroid. The expression can be decomposed as:</span></div>
<div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;<span class="comment"> *    d = || x - y_C ||^2 + || y_R ||^2 + 2 * (y_C|y_R) - 2 * (x|y_R)</span></div>
<div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;<span class="comment"> *        ---------------   ---------------------------       -------</span></div>
<div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;<span class="comment"> *             term 1                 term 2                   term 3</span></div>
<div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;<span class="comment"> * When using multiprobe, we use the following decomposition:</span></div>
<div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;<span class="comment"> * - term 1 is the distance to the coarse centroid, that is computed</span></div>
<div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;<span class="comment"> *   during the 1st stage search.</span></div>
<div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;<span class="comment"> * - term 2 can be precomputed, as it does not involve x. However,</span></div>
<div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;<span class="comment"> *   because of the PQ, it needs nlist * M * ksub storage. This is why</span></div>
<div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;<span class="comment"> *   use_precomputed_table is off by default</span></div>
<div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;<span class="comment"> * - term 3 is the classical non-residual distance table.</span></div>
<div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;<span class="comment"> * Since y_R defined by a product quantizer, it is split across</span></div>
<div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;<span class="comment"> * subvectors and stored separately for each subvector. If the coarse</span></div>
<div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;<span class="comment"> * quantizer is a MultiIndexQuantizer then the table can be stored</span></div>
<div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;<span class="comment"> * more compactly.</span></div>
<div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;<span class="comment"> * At search time, the tables for term 2 and term 3 are added up. This</span></div>
<div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;<span class="comment"> * is faster when the length of the lists is &gt; ksub * M.</span></div>
<div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;</div>
<div class="line"><a name="l00363"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#ad99c215aeaf92e995cb97f4044c4d267">  363</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#ad99c215aeaf92e995cb97f4044c4d267">IndexIVFPQ::precompute_table</a> ()</div>
<div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;{</div>
<div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a> == -1)</div>
<div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;        <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;</div>
<div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a> == 0) { <span class="comment">// then choose the type of table</span></div>
<div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;        <span class="keywordflow">if</span> (quantizer-&gt;<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_INNER_PRODUCT) {</div>
<div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;            <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>) {</div>
<div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;                printf(<span class="stringliteral">&quot;IndexIVFPQ::precompute_table: precomputed &quot;</span></div>
<div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;                        <span class="stringliteral">&quot;tables not needed for inner product quantizers\n&quot;</span>);</div>
<div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;            }</div>
<div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;            <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;        }</div>
<div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;        <span class="keyword">const</span> <a class="code" href="structfaiss_1_1MultiIndexQuantizer.html">MultiIndexQuantizer</a> *miq =</div>
<div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;            <span class="keyword">dynamic_cast&lt;</span><span class="keyword">const </span><a class="code" href="structfaiss_1_1MultiIndexQuantizer.html">MultiIndexQuantizer</a> *<span class="keyword">&gt;</span> (<a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>);</div>
<div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;        <span class="keywordflow">if</span> (miq &amp;&amp; <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> % miq-&gt;pq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> == 0)</div>
<div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;            <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a> = 2;</div>
<div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;        <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00381"></a><span class="lineno">  381</span>&#160;            <span class="keywordtype">size_t</span> table_size = <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a> * <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a> * <span class="keyword">sizeof</span>(float);</div>
<div class="line"><a name="l00382"></a><span class="lineno">  382</span>&#160;            <span class="keywordflow">if</span> (table_size &gt; <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a823ae6c4131996815fa4e90c7d1d13f6">precomputed_table_max_bytes</a>) {</div>
<div class="line"><a name="l00383"></a><span class="lineno">  383</span>&#160;                <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>) {</div>
<div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;                    printf(</div>
<div class="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;                       <span class="stringliteral">&quot;IndexIVFPQ::precompute_table: not precomputing table, &quot;</span></div>
<div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;                       <span class="stringliteral">&quot;it would be too big: %ld bytes (max %ld)\n&quot;</span>,</div>
<div class="line"><a name="l00387"></a><span class="lineno">  387</span>&#160;                       table_size, <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a823ae6c4131996815fa4e90c7d1d13f6">precomputed_table_max_bytes</a>);</div>
<div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160;                    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a> = 0;</div>
<div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;                }</div>
<div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;                <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;            }</div>
<div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;            <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a> = 1;</div>
<div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;        }</div>
<div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;    } <span class="comment">// otherwise assume user has set appropriate flag on input</span></div>
<div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;</div>
<div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>) {</div>
<div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;        printf (<span class="stringliteral">&quot;precomputing IVFPQ tables type %d\n&quot;</span>,</div>
<div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;                <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a>);</div>
<div class="line"><a name="l00399"></a><span class="lineno">  399</span>&#160;    }</div>
<div class="line"><a name="l00400"></a><span class="lineno">  400</span>&#160;</div>
<div class="line"><a name="l00401"></a><span class="lineno">  401</span>&#160;    <span class="comment">// squared norms of the PQ centroids</span></div>
<div class="line"><a name="l00402"></a><span class="lineno">  402</span>&#160;    std::vector&lt;float&gt; r_norms (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>, NAN);</div>
<div class="line"><a name="l00403"></a><span class="lineno">  403</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> m = 0; m &lt; <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a>; m++)</div>
<div class="line"><a name="l00404"></a><span class="lineno">  404</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j &lt; <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>; j++)</div>
<div class="line"><a name="l00405"></a><span class="lineno">  405</span>&#160;            r_norms [m * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a> + j] =</div>
<div class="line"><a name="l00406"></a><span class="lineno">  406</span>&#160;                <a class="code" href="namespacefaiss.html#a7a49180ebf10e643217bbce5862c7f84">fvec_norm_L2sqr</a> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a4f0f33c011dffe633a1748a48a082c22">get_centroids</a> (m, j), <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a467b451ca203544e42c250e4be65b983">dsub</a>);</div>
<div class="line"><a name="l00407"></a><span class="lineno">  407</span>&#160;</div>
<div class="line"><a name="l00408"></a><span class="lineno">  408</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a> == 1) {</div>
<div class="line"><a name="l00409"></a><span class="lineno">  409</span>&#160;</div>
<div class="line"><a name="l00410"></a><span class="lineno">  410</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9b310195d610c3e326471b3758206b59">precomputed_table</a>.resize (<a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>);</div>
<div class="line"><a name="l00411"></a><span class="lineno">  411</span>&#160;        std::vector&lt;float&gt; centroid (d);</div>
<div class="line"><a name="l00412"></a><span class="lineno">  412</span>&#160;</div>
<div class="line"><a name="l00413"></a><span class="lineno">  413</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>; i++) {</div>
<div class="line"><a name="l00414"></a><span class="lineno">  414</span>&#160;            quantizer-&gt;<a class="code" href="structfaiss_1_1Index.html#aaef6f4132b1f390121ebb11058baf190">reconstruct</a> (i, centroid.data());</div>
<div class="line"><a name="l00415"></a><span class="lineno">  415</span>&#160;</div>
<div class="line"><a name="l00416"></a><span class="lineno">  416</span>&#160;            <span class="keywordtype">float</span> *tab = &amp;<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9b310195d610c3e326471b3758206b59">precomputed_table</a>[i * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>];</div>
<div class="line"><a name="l00417"></a><span class="lineno">  417</span>&#160;            <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.compute_inner_prod_table (centroid.data(), tab);</div>
<div class="line"><a name="l00418"></a><span class="lineno">  418</span>&#160;            <a class="code" href="namespacefaiss.html#a40328c31abd0bbba5bd95d7de951e847">fvec_madd</a> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>, r_norms.data(), 2.0, tab, tab);</div>
<div class="line"><a name="l00419"></a><span class="lineno">  419</span>&#160;        }</div>
<div class="line"><a name="l00420"></a><span class="lineno">  420</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a> == 2) {</div>
<div class="line"><a name="l00421"></a><span class="lineno">  421</span>&#160;        <span class="keyword">const</span> <a class="code" href="structfaiss_1_1MultiIndexQuantizer.html">MultiIndexQuantizer</a> *miq =</div>
<div class="line"><a name="l00422"></a><span class="lineno">  422</span>&#160;           <span class="keyword">dynamic_cast&lt;</span><span class="keyword">const </span><a class="code" href="structfaiss_1_1MultiIndexQuantizer.html">MultiIndexQuantizer</a> *<span class="keyword">&gt;</span> (<a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>);</div>
<div class="line"><a name="l00423"></a><span class="lineno">  423</span>&#160;        FAISS_THROW_IF_NOT (miq);</div>
<div class="line"><a name="l00424"></a><span class="lineno">  424</span>&#160;        <span class="keyword">const</span> <a class="code" href="structfaiss_1_1ProductQuantizer.html">ProductQuantizer</a> &amp;cpq = miq-&gt;pq;</div>
<div class="line"><a name="l00425"></a><span class="lineno">  425</span>&#160;        FAISS_THROW_IF_NOT (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> % cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> == 0);</div>
<div class="line"><a name="l00426"></a><span class="lineno">  426</span>&#160;</div>
<div class="line"><a name="l00427"></a><span class="lineno">  427</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9b310195d610c3e326471b3758206b59">precomputed_table</a>.resize(cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>);</div>
<div class="line"><a name="l00428"></a><span class="lineno">  428</span>&#160;</div>
<div class="line"><a name="l00429"></a><span class="lineno">  429</span>&#160;        <span class="comment">// reorder PQ centroid table</span></div>
<div class="line"><a name="l00430"></a><span class="lineno">  430</span>&#160;        std::vector&lt;float&gt; centroids (d * cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>, NAN);</div>
<div class="line"><a name="l00431"></a><span class="lineno">  431</span>&#160;</div>
<div class="line"><a name="l00432"></a><span class="lineno">  432</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> m = 0; m &lt; cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a>; m++) {</div>
<div class="line"><a name="l00433"></a><span class="lineno">  433</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>; i++) {</div>
<div class="line"><a name="l00434"></a><span class="lineno">  434</span>&#160;                memcpy (centroids.data() + i * d + m * cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a467b451ca203544e42c250e4be65b983">dsub</a>,</div>
<div class="line"><a name="l00435"></a><span class="lineno">  435</span>&#160;                        cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a4f0f33c011dffe633a1748a48a082c22">get_centroids</a> (m, i),</div>
<div class="line"><a name="l00436"></a><span class="lineno">  436</span>&#160;                        <span class="keyword">sizeof</span> (*centroids.data()) * cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a467b451ca203544e42c250e4be65b983">dsub</a>);</div>
<div class="line"><a name="l00437"></a><span class="lineno">  437</span>&#160;            }</div>
<div class="line"><a name="l00438"></a><span class="lineno">  438</span>&#160;        }</div>
<div class="line"><a name="l00439"></a><span class="lineno">  439</span>&#160;</div>
<div class="line"><a name="l00440"></a><span class="lineno">  440</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.compute_inner_prod_tables (cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>, centroids.data (),</div>
<div class="line"><a name="l00441"></a><span class="lineno">  441</span>&#160;                                      <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9b310195d610c3e326471b3758206b59">precomputed_table</a>.data ());</div>
<div class="line"><a name="l00442"></a><span class="lineno">  442</span>&#160;</div>
<div class="line"><a name="l00443"></a><span class="lineno">  443</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; cpq.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>; i++) {</div>
<div class="line"><a name="l00444"></a><span class="lineno">  444</span>&#160;            <span class="keywordtype">float</span> *tab = &amp;<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9b310195d610c3e326471b3758206b59">precomputed_table</a>[i * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>];</div>
<div class="line"><a name="l00445"></a><span class="lineno">  445</span>&#160;            <a class="code" href="namespacefaiss.html#a40328c31abd0bbba5bd95d7de951e847">fvec_madd</a> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a> * <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>, r_norms.data(), 2.0, tab, tab);</div>
<div class="line"><a name="l00446"></a><span class="lineno">  446</span>&#160;        }</div>
<div class="line"><a name="l00447"></a><span class="lineno">  447</span>&#160;</div>
<div class="line"><a name="l00448"></a><span class="lineno">  448</span>&#160;    }</div>
<div class="line"><a name="l00449"></a><span class="lineno">  449</span>&#160;</div>
<div class="line"><a name="l00450"></a><span class="lineno">  450</span>&#160;}</div>
<div class="line"><a name="l00451"></a><span class="lineno">  451</span>&#160;</div>
<div class="line"><a name="l00452"></a><span class="lineno">  452</span>&#160;<span class="keyword">namespace </span>{</div>
<div class="line"><a name="l00453"></a><span class="lineno">  453</span>&#160;</div>
<div class="line"><a name="l00454"></a><span class="lineno">  454</span>&#160;<span class="keyword">using</span> idx_t = <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">Index::idx_t</a>;</div>
<div class="line"><a name="l00455"></a><span class="lineno">  455</span>&#160;</div>
<div class="line"><a name="l00456"></a><span class="lineno">  456</span>&#160;<span class="keyword">static</span> uint64_t get_cycles () {</div>
<div class="line"><a name="l00457"></a><span class="lineno">  457</span>&#160;<span class="preprocessor">#ifdef  __x86_64__</span></div>
<div class="line"><a name="l00458"></a><span class="lineno">  458</span>&#160;<span class="preprocessor"></span>    uint32_t high, low;</div>
<div class="line"><a name="l00459"></a><span class="lineno">  459</span>&#160;    <span class="keyword">asm</span> <span class="keyword">volatile</span>(<span class="stringliteral">&quot;rdtsc \n\t&quot;</span></div>
<div class="line"><a name="l00460"></a><span class="lineno">  460</span>&#160;                 : <span class="stringliteral">&quot;=a&quot;</span> (low),</div>
<div class="line"><a name="l00461"></a><span class="lineno">  461</span>&#160;                   <span class="stringliteral">&quot;=d&quot;</span> (high));</div>
<div class="line"><a name="l00462"></a><span class="lineno">  462</span>&#160;    <span class="keywordflow">return</span> ((uint64_t)high &lt;&lt; 32) | (low);</div>
<div class="line"><a name="l00463"></a><span class="lineno">  463</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00464"></a><span class="lineno">  464</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00465"></a><span class="lineno">  465</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00466"></a><span class="lineno">  466</span>&#160;<span class="preprocessor"></span>}</div>
<div class="line"><a name="l00467"></a><span class="lineno">  467</span>&#160;</div>
<div class="line"><a name="l00468"></a><span class="lineno">  468</span>&#160;<span class="preprocessor">#define TIC t0 = get_cycles()</span></div>
<div class="line"><a name="l00469"></a><span class="lineno">  469</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define TOC get_cycles () - t0</span></div>
<div class="line"><a name="l00470"></a><span class="lineno">  470</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00471"></a><span class="lineno">  471</span>&#160;</div>
<div class="line"><a name="l00472"></a><span class="lineno">  472</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00473"></a><span class="lineno">  473</span>&#160;<span class="comment">/** QueryTables manages the various ways of searching an</span></div>
<div class="line"><a name="l00474"></a><span class="lineno">  474</span>&#160;<span class="comment"> * IndexIVFPQ. The code contains a lot of branches, depending on:</span></div>
<div class="line"><a name="l00475"></a><span class="lineno">  475</span>&#160;<span class="comment"> * - metric_type: are we computing L2 or Inner product similarity?</span></div>
<div class="line"><a name="l00476"></a><span class="lineno">  476</span>&#160;<span class="comment"> * - by_residual: do we encode raw vectors or residuals?</span></div>
<div class="line"><a name="l00477"></a><span class="lineno">  477</span>&#160;<span class="comment"> * - use_precomputed_table: are x_R|x_C tables precomputed?</span></div>
<div class="line"><a name="l00478"></a><span class="lineno">  478</span>&#160;<span class="comment"> * - polysemous_ht: are we filtering with polysemous codes?</span></div>
<div class="line"><a name="l00479"></a><span class="lineno">  479</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00480"></a><span class="lineno">  480</span>&#160;<span class="keyword">struct </span>QueryTables {</div>
<div class="line"><a name="l00481"></a><span class="lineno">  481</span>&#160;</div>
<div class="line"><a name="l00482"></a><span class="lineno">  482</span>&#160;    <span class="comment">/*****************************************************</span></div>
<div class="line"><a name="l00483"></a><span class="lineno">  483</span>&#160;<span class="comment">     * General data from the IVFPQ</span></div>
<div class="line"><a name="l00484"></a><span class="lineno">  484</span>&#160;<span class="comment">     *****************************************************/</span></div>
<div class="line"><a name="l00485"></a><span class="lineno">  485</span>&#160;</div>
<div class="line"><a name="l00486"></a><span class="lineno">  486</span>&#160;    <span class="keyword">const</span> IndexIVFPQ &amp; ivfpq;</div>
<div class="line"><a name="l00487"></a><span class="lineno">  487</span>&#160;    <span class="keyword">const</span> IVFSearchParameters *params;</div>
<div class="line"><a name="l00488"></a><span class="lineno">  488</span>&#160;</div>
<div class="line"><a name="l00489"></a><span class="lineno">  489</span>&#160;    <span class="comment">// copied from IndexIVFPQ for easier access</span></div>
<div class="line"><a name="l00490"></a><span class="lineno">  490</span>&#160;    <span class="keywordtype">int</span> d;</div>
<div class="line"><a name="l00491"></a><span class="lineno">  491</span>&#160;    <span class="keyword">const</span> ProductQuantizer &amp; pq;</div>
<div class="line"><a name="l00492"></a><span class="lineno">  492</span>&#160;    <a class="code" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">MetricType</a> metric_type;</div>
<div class="line"><a name="l00493"></a><span class="lineno">  493</span>&#160;    <span class="keywordtype">bool</span> by_residual;</div>
<div class="line"><a name="l00494"></a><span class="lineno">  494</span>&#160;    <span class="keywordtype">int</span> use_precomputed_table;</div>
<div class="line"><a name="l00495"></a><span class="lineno">  495</span>&#160;    <span class="keywordtype">int</span> polysemous_ht;</div>
<div class="line"><a name="l00496"></a><span class="lineno">  496</span>&#160;</div>
<div class="line"><a name="l00497"></a><span class="lineno">  497</span>&#160;    <span class="comment">// pre-allocated data buffers</span></div>
<div class="line"><a name="l00498"></a><span class="lineno">  498</span>&#160;    <span class="keywordtype">float</span> * sim_table, * sim_table_2;</div>
<div class="line"><a name="l00499"></a><span class="lineno">  499</span>&#160;    <span class="keywordtype">float</span> * residual_vec, *decoded_vec;</div>
<div class="line"><a name="l00500"></a><span class="lineno">  500</span>&#160;</div>
<div class="line"><a name="l00501"></a><span class="lineno">  501</span>&#160;    <span class="comment">// single data buffer</span></div>
<div class="line"><a name="l00502"></a><span class="lineno">  502</span>&#160;    std::vector&lt;float&gt; mem;</div>
<div class="line"><a name="l00503"></a><span class="lineno">  503</span>&#160;</div>
<div class="line"><a name="l00504"></a><span class="lineno">  504</span>&#160;    <span class="comment">// for table pointers</span></div>
<div class="line"><a name="l00505"></a><span class="lineno">  505</span>&#160;    std::vector&lt;const float *&gt; sim_table_ptrs;</div>
<div class="line"><a name="l00506"></a><span class="lineno">  506</span>&#160;</div>
<div class="line"><a name="l00507"></a><span class="lineno">  507</span>&#160;    <span class="keyword">explicit</span> QueryTables (<span class="keyword">const</span> IndexIVFPQ &amp; ivfpq,</div>
<div class="line"><a name="l00508"></a><span class="lineno">  508</span>&#160;                          <span class="keyword">const</span> IVFSearchParameters *params):</div>
<div class="line"><a name="l00509"></a><span class="lineno">  509</span>&#160;        ivfpq(ivfpq),</div>
<div class="line"><a name="l00510"></a><span class="lineno">  510</span>&#160;        d(ivfpq.d),</div>
<div class="line"><a name="l00511"></a><span class="lineno">  511</span>&#160;        pq (ivfpq.pq),</div>
<div class="line"><a name="l00512"></a><span class="lineno">  512</span>&#160;        metric_type (ivfpq.metric_type),</div>
<div class="line"><a name="l00513"></a><span class="lineno">  513</span>&#160;        by_residual (ivfpq.by_residual),</div>
<div class="line"><a name="l00514"></a><span class="lineno">  514</span>&#160;        use_precomputed_table (ivfpq.use_precomputed_table)</div>
<div class="line"><a name="l00515"></a><span class="lineno">  515</span>&#160;    {</div>
<div class="line"><a name="l00516"></a><span class="lineno">  516</span>&#160;        mem.resize (pq.ksub * pq.M * 2 + d * 2);</div>
<div class="line"><a name="l00517"></a><span class="lineno">  517</span>&#160;        sim_table = mem.data ();</div>
<div class="line"><a name="l00518"></a><span class="lineno">  518</span>&#160;        sim_table_2 = sim_table + pq.ksub * pq.M;</div>
<div class="line"><a name="l00519"></a><span class="lineno">  519</span>&#160;        residual_vec = sim_table_2 + pq.ksub * pq.M;</div>
<div class="line"><a name="l00520"></a><span class="lineno">  520</span>&#160;        decoded_vec = residual_vec + d;</div>
<div class="line"><a name="l00521"></a><span class="lineno">  521</span>&#160;</div>
<div class="line"><a name="l00522"></a><span class="lineno">  522</span>&#160;        <span class="comment">// for polysemous</span></div>
<div class="line"><a name="l00523"></a><span class="lineno">  523</span>&#160;        polysemous_ht = ivfpq.polysemous_ht;</div>
<div class="line"><a name="l00524"></a><span class="lineno">  524</span>&#160;        <span class="keywordflow">if</span> (<span class="keyword">auto</span> ivfpq_params =</div>
<div class="line"><a name="l00525"></a><span class="lineno">  525</span>&#160;            dynamic_cast&lt;const IVFPQSearchParameters *&gt;(params)) {</div>
<div class="line"><a name="l00526"></a><span class="lineno">  526</span>&#160;            polysemous_ht = ivfpq_params-&gt;polysemous_ht;</div>
<div class="line"><a name="l00527"></a><span class="lineno">  527</span>&#160;        }</div>
<div class="line"><a name="l00528"></a><span class="lineno">  528</span>&#160;        <span class="keywordflow">if</span> (polysemous_ht != 0)  {</div>
<div class="line"><a name="l00529"></a><span class="lineno">  529</span>&#160;            q_code.resize (pq.code_size);</div>
<div class="line"><a name="l00530"></a><span class="lineno">  530</span>&#160;        }</div>
<div class="line"><a name="l00531"></a><span class="lineno">  531</span>&#160;        init_list_cycles = 0;</div>
<div class="line"><a name="l00532"></a><span class="lineno">  532</span>&#160;        sim_table_ptrs.resize (pq.M);</div>
<div class="line"><a name="l00533"></a><span class="lineno">  533</span>&#160;    }</div>
<div class="line"><a name="l00534"></a><span class="lineno">  534</span>&#160;</div>
<div class="line"><a name="l00535"></a><span class="lineno">  535</span>&#160;    <span class="comment">/*****************************************************</span></div>
<div class="line"><a name="l00536"></a><span class="lineno">  536</span>&#160;<span class="comment">     * What we do when query is known</span></div>
<div class="line"><a name="l00537"></a><span class="lineno">  537</span>&#160;<span class="comment">     *****************************************************/</span></div>
<div class="line"><a name="l00538"></a><span class="lineno">  538</span>&#160;</div>
<div class="line"><a name="l00539"></a><span class="lineno">  539</span>&#160;    <span class="comment">// field specific to query</span></div>
<div class="line"><a name="l00540"></a><span class="lineno">  540</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> * qi;</div>
<div class="line"><a name="l00541"></a><span class="lineno">  541</span>&#160;</div>
<div class="line"><a name="l00542"></a><span class="lineno">  542</span>&#160;    <span class="comment">// query-specific intialization</span></div>
<div class="line"><a name="l00543"></a><span class="lineno">  543</span>&#160;    <span class="keywordtype">void</span> init_query (<span class="keyword">const</span> <span class="keywordtype">float</span> * qi) {</div>
<div class="line"><a name="l00544"></a><span class="lineno">  544</span>&#160;        this-&gt;qi = qi;</div>
<div class="line"><a name="l00545"></a><span class="lineno">  545</span>&#160;        <span class="keywordflow">if</span> (metric_type == METRIC_INNER_PRODUCT)</div>
<div class="line"><a name="l00546"></a><span class="lineno">  546</span>&#160;            init_query_IP ();</div>
<div class="line"><a name="l00547"></a><span class="lineno">  547</span>&#160;        <span class="keywordflow">else</span></div>
<div class="line"><a name="l00548"></a><span class="lineno">  548</span>&#160;            init_query_L2 ();</div>
<div class="line"><a name="l00549"></a><span class="lineno">  549</span>&#160;        <span class="keywordflow">if</span> (!by_residual &amp;&amp; polysemous_ht != 0)</div>
<div class="line"><a name="l00550"></a><span class="lineno">  550</span>&#160;            pq.compute_code (qi, q_code.data());</div>
<div class="line"><a name="l00551"></a><span class="lineno">  551</span>&#160;    }</div>
<div class="line"><a name="l00552"></a><span class="lineno">  552</span>&#160;</div>
<div class="line"><a name="l00553"></a><span class="lineno">  553</span>&#160;    <span class="keywordtype">void</span> init_query_IP () {</div>
<div class="line"><a name="l00554"></a><span class="lineno">  554</span>&#160;        <span class="comment">// precompute some tables specific to the query qi</span></div>
<div class="line"><a name="l00555"></a><span class="lineno">  555</span>&#160;        pq.compute_inner_prod_table (qi, sim_table);</div>
<div class="line"><a name="l00556"></a><span class="lineno">  556</span>&#160;    }</div>
<div class="line"><a name="l00557"></a><span class="lineno">  557</span>&#160;</div>
<div class="line"><a name="l00558"></a><span class="lineno">  558</span>&#160;    <span class="keywordtype">void</span> init_query_L2 () {</div>
<div class="line"><a name="l00559"></a><span class="lineno">  559</span>&#160;        <span class="keywordflow">if</span> (!by_residual) {</div>
<div class="line"><a name="l00560"></a><span class="lineno">  560</span>&#160;            pq.compute_distance_table (qi, sim_table);</div>
<div class="line"><a name="l00561"></a><span class="lineno">  561</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (use_precomputed_table) {</div>
<div class="line"><a name="l00562"></a><span class="lineno">  562</span>&#160;            pq.compute_inner_prod_table (qi, sim_table_2);</div>
<div class="line"><a name="l00563"></a><span class="lineno">  563</span>&#160;        }</div>
<div class="line"><a name="l00564"></a><span class="lineno">  564</span>&#160;    }</div>
<div class="line"><a name="l00565"></a><span class="lineno">  565</span>&#160;</div>
<div class="line"><a name="l00566"></a><span class="lineno">  566</span>&#160;    <span class="comment">/*****************************************************</span></div>
<div class="line"><a name="l00567"></a><span class="lineno">  567</span>&#160;<span class="comment">     * When inverted list is known: prepare computations</span></div>
<div class="line"><a name="l00568"></a><span class="lineno">  568</span>&#160;<span class="comment">     *****************************************************/</span></div>
<div class="line"><a name="l00569"></a><span class="lineno">  569</span>&#160;</div>
<div class="line"><a name="l00570"></a><span class="lineno">  570</span>&#160;    <span class="comment">// fields specific to list</span></div>
<div class="line"><a name="l00571"></a><span class="lineno">  571</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">Index::idx_t</a> key;</div>
<div class="line"><a name="l00572"></a><span class="lineno">  572</span>&#160;    <span class="keywordtype">float</span> coarse_dis;</div>
<div class="line"><a name="l00573"></a><span class="lineno">  573</span>&#160;    std::vector&lt;uint8_t&gt; q_code;</div>
<div class="line"><a name="l00574"></a><span class="lineno">  574</span>&#160;</div>
<div class="line"><a name="l00575"></a><span class="lineno">  575</span>&#160;    uint64_t init_list_cycles;</div>
<div class="line"><a name="l00576"></a><span class="lineno">  576</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00577"></a><span class="lineno">  577</span>&#160;<span class="comment">    /// once we know the query and the centroid, we can prepare the</span></div>
<div class="line"><a name="l00578"></a><span class="lineno">  578</span>&#160;<span class="comment">    /// sim_table that will be used for accumulation</span></div>
<div class="line"><a name="l00579"></a><span class="lineno">  579</span>&#160;<span class="comment">    /// and dis0, the initial value</span></div>
<div class="line"><a name="l00580"></a><span class="lineno">  580</span>&#160;<span class="comment"></span>    <span class="keywordtype">float</span> precompute_list_tables () {</div>
<div class="line"><a name="l00581"></a><span class="lineno">  581</span>&#160;        <span class="keywordtype">float</span> dis0 = 0;</div>
<div class="line"><a name="l00582"></a><span class="lineno">  582</span>&#160;        uint64_t t0; TIC;</div>
<div class="line"><a name="l00583"></a><span class="lineno">  583</span>&#160;        <span class="keywordflow">if</span> (by_residual) {</div>
<div class="line"><a name="l00584"></a><span class="lineno">  584</span>&#160;            <span class="keywordflow">if</span> (metric_type == METRIC_INNER_PRODUCT)</div>
<div class="line"><a name="l00585"></a><span class="lineno">  585</span>&#160;                dis0 = precompute_list_tables_IP ();</div>
<div class="line"><a name="l00586"></a><span class="lineno">  586</span>&#160;            <span class="keywordflow">else</span></div>
<div class="line"><a name="l00587"></a><span class="lineno">  587</span>&#160;                dis0 = precompute_list_tables_L2 ();</div>
<div class="line"><a name="l00588"></a><span class="lineno">  588</span>&#160;        }</div>
<div class="line"><a name="l00589"></a><span class="lineno">  589</span>&#160;        init_list_cycles += TOC;</div>
<div class="line"><a name="l00590"></a><span class="lineno">  590</span>&#160;        <span class="keywordflow">return</span> dis0;</div>
<div class="line"><a name="l00591"></a><span class="lineno">  591</span>&#160;     }</div>
<div class="line"><a name="l00592"></a><span class="lineno">  592</span>&#160;</div>
<div class="line"><a name="l00593"></a><span class="lineno">  593</span>&#160;    <span class="keywordtype">float</span> precompute_list_table_pointers () {</div>
<div class="line"><a name="l00594"></a><span class="lineno">  594</span>&#160;        <span class="keywordtype">float</span> dis0 = 0;</div>
<div class="line"><a name="l00595"></a><span class="lineno">  595</span>&#160;        uint64_t t0; TIC;</div>
<div class="line"><a name="l00596"></a><span class="lineno">  596</span>&#160;        <span class="keywordflow">if</span> (by_residual) {</div>
<div class="line"><a name="l00597"></a><span class="lineno">  597</span>&#160;            <span class="keywordflow">if</span> (metric_type == METRIC_INNER_PRODUCT)</div>
<div class="line"><a name="l00598"></a><span class="lineno">  598</span>&#160;              FAISS_THROW_MSG (<span class="stringliteral">&quot;not implemented&quot;</span>);</div>
<div class="line"><a name="l00599"></a><span class="lineno">  599</span>&#160;            <span class="keywordflow">else</span></div>
<div class="line"><a name="l00600"></a><span class="lineno">  600</span>&#160;              dis0 = precompute_list_table_pointers_L2 ();</div>
<div class="line"><a name="l00601"></a><span class="lineno">  601</span>&#160;        }</div>
<div class="line"><a name="l00602"></a><span class="lineno">  602</span>&#160;        init_list_cycles += TOC;</div>
<div class="line"><a name="l00603"></a><span class="lineno">  603</span>&#160;        <span class="keywordflow">return</span> dis0;</div>
<div class="line"><a name="l00604"></a><span class="lineno">  604</span>&#160;     }</div>
<div class="line"><a name="l00605"></a><span class="lineno">  605</span>&#160;</div>
<div class="line"><a name="l00606"></a><span class="lineno">  606</span>&#160;    <span class="comment">/*****************************************************</span></div>
<div class="line"><a name="l00607"></a><span class="lineno">  607</span>&#160;<span class="comment">     * compute tables for inner prod</span></div>
<div class="line"><a name="l00608"></a><span class="lineno">  608</span>&#160;<span class="comment">     *****************************************************/</span></div>
<div class="line"><a name="l00609"></a><span class="lineno">  609</span>&#160;</div>
<div class="line"><a name="l00610"></a><span class="lineno">  610</span>&#160;    <span class="keywordtype">float</span> precompute_list_tables_IP ()</div>
<div class="line"><a name="l00611"></a><span class="lineno">  611</span>&#160;    {</div>
<div class="line"><a name="l00612"></a><span class="lineno">  612</span>&#160;        <span class="comment">// prepare the sim_table that will be used for accumulation</span></div>
<div class="line"><a name="l00613"></a><span class="lineno">  613</span>&#160;        <span class="comment">// and dis0, the initial value</span></div>
<div class="line"><a name="l00614"></a><span class="lineno">  614</span>&#160;        ivfpq.quantizer-&gt;reconstruct (key, decoded_vec);</div>
<div class="line"><a name="l00615"></a><span class="lineno">  615</span>&#160;        <span class="comment">// decoded_vec = centroid</span></div>
<div class="line"><a name="l00616"></a><span class="lineno">  616</span>&#160;        <span class="keywordtype">float</span> dis0 = fvec_inner_product (qi, decoded_vec, d);</div>
<div class="line"><a name="l00617"></a><span class="lineno">  617</span>&#160;</div>
<div class="line"><a name="l00618"></a><span class="lineno">  618</span>&#160;        <span class="keywordflow">if</span> (polysemous_ht) {</div>
<div class="line"><a name="l00619"></a><span class="lineno">  619</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; d; i++) {</div>
<div class="line"><a name="l00620"></a><span class="lineno">  620</span>&#160;                residual_vec [i] = qi[i] - decoded_vec[i];</div>
<div class="line"><a name="l00621"></a><span class="lineno">  621</span>&#160;            }</div>
<div class="line"><a name="l00622"></a><span class="lineno">  622</span>&#160;            pq.compute_code (residual_vec, q_code.data());</div>
<div class="line"><a name="l00623"></a><span class="lineno">  623</span>&#160;        }</div>
<div class="line"><a name="l00624"></a><span class="lineno">  624</span>&#160;        <span class="keywordflow">return</span> dis0;</div>
<div class="line"><a name="l00625"></a><span class="lineno">  625</span>&#160;    }</div>
<div class="line"><a name="l00626"></a><span class="lineno">  626</span>&#160;</div>
<div class="line"><a name="l00627"></a><span class="lineno">  627</span>&#160;</div>
<div class="line"><a name="l00628"></a><span class="lineno">  628</span>&#160;    <span class="comment">/*****************************************************</span></div>
<div class="line"><a name="l00629"></a><span class="lineno">  629</span>&#160;<span class="comment">     * compute tables for L2 distance</span></div>
<div class="line"><a name="l00630"></a><span class="lineno">  630</span>&#160;<span class="comment">     *****************************************************/</span></div>
<div class="line"><a name="l00631"></a><span class="lineno">  631</span>&#160;</div>
<div class="line"><a name="l00632"></a><span class="lineno">  632</span>&#160;    <span class="keywordtype">float</span> precompute_list_tables_L2 ()</div>
<div class="line"><a name="l00633"></a><span class="lineno">  633</span>&#160;    {</div>
<div class="line"><a name="l00634"></a><span class="lineno">  634</span>&#160;        <span class="keywordtype">float</span> dis0 = 0;</div>
<div class="line"><a name="l00635"></a><span class="lineno">  635</span>&#160;</div>
<div class="line"><a name="l00636"></a><span class="lineno">  636</span>&#160;        <span class="keywordflow">if</span> (use_precomputed_table == 0 || use_precomputed_table == -1) {</div>
<div class="line"><a name="l00637"></a><span class="lineno">  637</span>&#160;            ivfpq.quantizer-&gt;compute_residual (qi, residual_vec, key);</div>
<div class="line"><a name="l00638"></a><span class="lineno">  638</span>&#160;            pq.compute_distance_table (residual_vec, sim_table);</div>
<div class="line"><a name="l00639"></a><span class="lineno">  639</span>&#160;</div>
<div class="line"><a name="l00640"></a><span class="lineno">  640</span>&#160;            <span class="keywordflow">if</span> (polysemous_ht != 0) {</div>
<div class="line"><a name="l00641"></a><span class="lineno">  641</span>&#160;                pq.compute_code (residual_vec, q_code.data());</div>
<div class="line"><a name="l00642"></a><span class="lineno">  642</span>&#160;            }</div>
<div class="line"><a name="l00643"></a><span class="lineno">  643</span>&#160;</div>
<div class="line"><a name="l00644"></a><span class="lineno">  644</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (use_precomputed_table == 1) {</div>
<div class="line"><a name="l00645"></a><span class="lineno">  645</span>&#160;            dis0 = coarse_dis;</div>
<div class="line"><a name="l00646"></a><span class="lineno">  646</span>&#160;</div>
<div class="line"><a name="l00647"></a><span class="lineno">  647</span>&#160;            <a class="code" href="namespacefaiss.html#a40328c31abd0bbba5bd95d7de951e847">fvec_madd</a> (pq.M * pq.ksub,</div>
<div class="line"><a name="l00648"></a><span class="lineno">  648</span>&#160;                       &amp;ivfpq.precomputed_table [key * pq.ksub * pq.M],</div>
<div class="line"><a name="l00649"></a><span class="lineno">  649</span>&#160;                       -2.0, sim_table_2,</div>
<div class="line"><a name="l00650"></a><span class="lineno">  650</span>&#160;                       sim_table);</div>
<div class="line"><a name="l00651"></a><span class="lineno">  651</span>&#160;</div>
<div class="line"><a name="l00652"></a><span class="lineno">  652</span>&#160;</div>
<div class="line"><a name="l00653"></a><span class="lineno">  653</span>&#160;            <span class="keywordflow">if</span> (polysemous_ht != 0) {</div>
<div class="line"><a name="l00654"></a><span class="lineno">  654</span>&#160;                ivfpq.quantizer-&gt;compute_residual (qi, residual_vec, key);</div>
<div class="line"><a name="l00655"></a><span class="lineno">  655</span>&#160;                pq.compute_code (residual_vec, q_code.data());</div>
<div class="line"><a name="l00656"></a><span class="lineno">  656</span>&#160;            }</div>
<div class="line"><a name="l00657"></a><span class="lineno">  657</span>&#160;</div>
<div class="line"><a name="l00658"></a><span class="lineno">  658</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (use_precomputed_table == 2) {</div>
<div class="line"><a name="l00659"></a><span class="lineno">  659</span>&#160;            dis0 = coarse_dis;</div>
<div class="line"><a name="l00660"></a><span class="lineno">  660</span>&#160;</div>
<div class="line"><a name="l00661"></a><span class="lineno">  661</span>&#160;            <span class="keyword">const</span> MultiIndexQuantizer *miq =</div>
<div class="line"><a name="l00662"></a><span class="lineno">  662</span>&#160;                <span class="keyword">dynamic_cast&lt;</span><span class="keyword">const </span>MultiIndexQuantizer *<span class="keyword">&gt;</span> (ivfpq.quantizer);</div>
<div class="line"><a name="l00663"></a><span class="lineno">  663</span>&#160;            FAISS_THROW_IF_NOT (miq);</div>
<div class="line"><a name="l00664"></a><span class="lineno">  664</span>&#160;            <span class="keyword">const</span> ProductQuantizer &amp;cpq = miq-&gt;pq;</div>
<div class="line"><a name="l00665"></a><span class="lineno">  665</span>&#160;            <span class="keywordtype">int</span> Mf = pq.M / cpq.M;</div>
<div class="line"><a name="l00666"></a><span class="lineno">  666</span>&#160;</div>
<div class="line"><a name="l00667"></a><span class="lineno">  667</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">float</span> *qtab = sim_table_2; <span class="comment">// query-specific table</span></div>
<div class="line"><a name="l00668"></a><span class="lineno">  668</span>&#160;            <span class="keywordtype">float</span> *ltab = sim_table; <span class="comment">// (output) list-specific table</span></div>
<div class="line"><a name="l00669"></a><span class="lineno">  669</span>&#160;</div>
<div class="line"><a name="l00670"></a><span class="lineno">  670</span>&#160;            <span class="keywordtype">long</span> k = key;</div>
<div class="line"><a name="l00671"></a><span class="lineno">  671</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">int</span> cm = 0; cm &lt; cpq.M; cm++) {</div>
<div class="line"><a name="l00672"></a><span class="lineno">  672</span>&#160;                <span class="comment">// compute PQ index</span></div>
<div class="line"><a name="l00673"></a><span class="lineno">  673</span>&#160;                <span class="keywordtype">int</span> ki = k &amp; ((uint64_t(1) &lt;&lt; cpq.nbits) - 1);</div>
<div class="line"><a name="l00674"></a><span class="lineno">  674</span>&#160;                k &gt;&gt;= cpq.nbits;</div>
<div class="line"><a name="l00675"></a><span class="lineno">  675</span>&#160;</div>
<div class="line"><a name="l00676"></a><span class="lineno">  676</span>&#160;                <span class="comment">// get corresponding table</span></div>
<div class="line"><a name="l00677"></a><span class="lineno">  677</span>&#160;                <span class="keyword">const</span> <span class="keywordtype">float</span> *pc = &amp;ivfpq.precomputed_table</div>
<div class="line"><a name="l00678"></a><span class="lineno">  678</span>&#160;                    [(ki * pq.M + cm * Mf) * pq.ksub];</div>
<div class="line"><a name="l00679"></a><span class="lineno">  679</span>&#160;</div>
<div class="line"><a name="l00680"></a><span class="lineno">  680</span>&#160;                if (polysemous_ht == 0) {</div>
<div class="line"><a name="l00681"></a><span class="lineno">  681</span>&#160;</div>
<div class="line"><a name="l00682"></a><span class="lineno">  682</span>&#160;                    <span class="comment">// sum up with query-specific table</span></div>
<div class="line"><a name="l00683"></a><span class="lineno">  683</span>&#160;                    <a class="code" href="namespacefaiss.html#a40328c31abd0bbba5bd95d7de951e847">fvec_madd</a> (Mf * pq.ksub,</div>
<div class="line"><a name="l00684"></a><span class="lineno">  684</span>&#160;                               pc,</div>
<div class="line"><a name="l00685"></a><span class="lineno">  685</span>&#160;                               -2.0, qtab,</div>
<div class="line"><a name="l00686"></a><span class="lineno">  686</span>&#160;                               ltab);</div>
<div class="line"><a name="l00687"></a><span class="lineno">  687</span>&#160;                    ltab += Mf * pq.ksub;</div>
<div class="line"><a name="l00688"></a><span class="lineno">  688</span>&#160;                    qtab += Mf * pq.ksub;</div>
<div class="line"><a name="l00689"></a><span class="lineno">  689</span>&#160;                } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00690"></a><span class="lineno">  690</span>&#160;                    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> m = cm * Mf; m &lt; (cm + 1) * Mf; m++) {</div>
<div class="line"><a name="l00691"></a><span class="lineno">  691</span>&#160;                        q_code[m] = <a class="code" href="namespacefaiss.html#a9da63b8bb84460f5e8ccf8e17622cc7a">fvec_madd_and_argmin</a></div>
<div class="line"><a name="l00692"></a><span class="lineno">  692</span>&#160;                            (pq.ksub, pc, -2, qtab, ltab);</div>
<div class="line"><a name="l00693"></a><span class="lineno">  693</span>&#160;                        pc += pq.ksub;</div>
<div class="line"><a name="l00694"></a><span class="lineno">  694</span>&#160;                        ltab += pq.ksub;</div>
<div class="line"><a name="l00695"></a><span class="lineno">  695</span>&#160;                        qtab += pq.ksub;</div>
<div class="line"><a name="l00696"></a><span class="lineno">  696</span>&#160;                    }</div>
<div class="line"><a name="l00697"></a><span class="lineno">  697</span>&#160;                }</div>
<div class="line"><a name="l00698"></a><span class="lineno">  698</span>&#160;</div>
<div class="line"><a name="l00699"></a><span class="lineno">  699</span>&#160;            }</div>
<div class="line"><a name="l00700"></a><span class="lineno">  700</span>&#160;        }</div>
<div class="line"><a name="l00701"></a><span class="lineno">  701</span>&#160;</div>
<div class="line"><a name="l00702"></a><span class="lineno">  702</span>&#160;        <span class="keywordflow">return</span> dis0;</div>
<div class="line"><a name="l00703"></a><span class="lineno">  703</span>&#160;    }</div>
<div class="line"><a name="l00704"></a><span class="lineno">  704</span>&#160;</div>
<div class="line"><a name="l00705"></a><span class="lineno">  705</span>&#160;    <span class="keywordtype">float</span> precompute_list_table_pointers_L2 ()</div>
<div class="line"><a name="l00706"></a><span class="lineno">  706</span>&#160;    {</div>
<div class="line"><a name="l00707"></a><span class="lineno">  707</span>&#160;        <span class="keywordtype">float</span> dis0 = 0;</div>
<div class="line"><a name="l00708"></a><span class="lineno">  708</span>&#160;</div>
<div class="line"><a name="l00709"></a><span class="lineno">  709</span>&#160;        <span class="keywordflow">if</span> (use_precomputed_table == 1) {</div>
<div class="line"><a name="l00710"></a><span class="lineno">  710</span>&#160;            dis0 = coarse_dis;</div>
<div class="line"><a name="l00711"></a><span class="lineno">  711</span>&#160;</div>
<div class="line"><a name="l00712"></a><span class="lineno">  712</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">float</span> * s = &amp;ivfpq.precomputed_table [key * pq.ksub * pq.M];</div>
<div class="line"><a name="l00713"></a><span class="lineno">  713</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">int</span> m = 0; m &lt; pq.M; m++) {</div>
<div class="line"><a name="l00714"></a><span class="lineno">  714</span>&#160;                sim_table_ptrs [m] = s;</div>
<div class="line"><a name="l00715"></a><span class="lineno">  715</span>&#160;                s += pq.ksub;</div>
<div class="line"><a name="l00716"></a><span class="lineno">  716</span>&#160;            }</div>
<div class="line"><a name="l00717"></a><span class="lineno">  717</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (use_precomputed_table == 2) {</div>
<div class="line"><a name="l00718"></a><span class="lineno">  718</span>&#160;            dis0 = coarse_dis;</div>
<div class="line"><a name="l00719"></a><span class="lineno">  719</span>&#160;</div>
<div class="line"><a name="l00720"></a><span class="lineno">  720</span>&#160;            <span class="keyword">const</span> MultiIndexQuantizer *miq =</div>
<div class="line"><a name="l00721"></a><span class="lineno">  721</span>&#160;                <span class="keyword">dynamic_cast&lt;</span><span class="keyword">const </span>MultiIndexQuantizer *<span class="keyword">&gt;</span> (ivfpq.quantizer);</div>
<div class="line"><a name="l00722"></a><span class="lineno">  722</span>&#160;            FAISS_THROW_IF_NOT (miq);</div>
<div class="line"><a name="l00723"></a><span class="lineno">  723</span>&#160;            <span class="keyword">const</span> ProductQuantizer &amp;cpq = miq-&gt;pq;</div>
<div class="line"><a name="l00724"></a><span class="lineno">  724</span>&#160;            <span class="keywordtype">int</span> Mf = pq.M / cpq.M;</div>
<div class="line"><a name="l00725"></a><span class="lineno">  725</span>&#160;</div>
<div class="line"><a name="l00726"></a><span class="lineno">  726</span>&#160;            <span class="keywordtype">long</span> k = key;</div>
<div class="line"><a name="l00727"></a><span class="lineno">  727</span>&#160;            <span class="keywordtype">int</span> m0 = 0;</div>
<div class="line"><a name="l00728"></a><span class="lineno">  728</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">int</span> cm = 0; cm &lt; cpq.M; cm++) {</div>
<div class="line"><a name="l00729"></a><span class="lineno">  729</span>&#160;                <span class="keywordtype">int</span> ki = k &amp; ((uint64_t(1) &lt;&lt; cpq.nbits) - 1);</div>
<div class="line"><a name="l00730"></a><span class="lineno">  730</span>&#160;                k &gt;&gt;= cpq.nbits;</div>
<div class="line"><a name="l00731"></a><span class="lineno">  731</span>&#160;</div>
<div class="line"><a name="l00732"></a><span class="lineno">  732</span>&#160;                <span class="keyword">const</span> <span class="keywordtype">float</span> *pc = &amp;ivfpq.precomputed_table</div>
<div class="line"><a name="l00733"></a><span class="lineno">  733</span>&#160;                    [(ki * pq.M + cm * Mf) * pq.ksub];</div>
<div class="line"><a name="l00734"></a><span class="lineno">  734</span>&#160;</div>
<div class="line"><a name="l00735"></a><span class="lineno">  735</span>&#160;                for (<span class="keywordtype">int</span> m = m0; m &lt; m0 + Mf; m++) {</div>
<div class="line"><a name="l00736"></a><span class="lineno">  736</span>&#160;                    sim_table_ptrs [m] = pc;</div>
<div class="line"><a name="l00737"></a><span class="lineno">  737</span>&#160;                    pc += pq.ksub;</div>
<div class="line"><a name="l00738"></a><span class="lineno">  738</span>&#160;                }</div>
<div class="line"><a name="l00739"></a><span class="lineno">  739</span>&#160;                m0 += Mf;</div>
<div class="line"><a name="l00740"></a><span class="lineno">  740</span>&#160;            }</div>
<div class="line"><a name="l00741"></a><span class="lineno">  741</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00742"></a><span class="lineno">  742</span>&#160;          FAISS_THROW_MSG (<span class="stringliteral">&quot;need precomputed tables&quot;</span>);</div>
<div class="line"><a name="l00743"></a><span class="lineno">  743</span>&#160;        }</div>
<div class="line"><a name="l00744"></a><span class="lineno">  744</span>&#160;</div>
<div class="line"><a name="l00745"></a><span class="lineno">  745</span>&#160;        <span class="keywordflow">if</span> (polysemous_ht) {</div>
<div class="line"><a name="l00746"></a><span class="lineno">  746</span>&#160;            FAISS_THROW_MSG (<span class="stringliteral">&quot;not implemented&quot;</span>);</div>
<div class="line"><a name="l00747"></a><span class="lineno">  747</span>&#160;            <span class="comment">// Not clear that it makes sense to implemente this,</span></div>
<div class="line"><a name="l00748"></a><span class="lineno">  748</span>&#160;            <span class="comment">// because it costs M * ksub, which is what we wanted to</span></div>
<div class="line"><a name="l00749"></a><span class="lineno">  749</span>&#160;            <span class="comment">// avoid with the tables pointers.</span></div>
<div class="line"><a name="l00750"></a><span class="lineno">  750</span>&#160;        }</div>
<div class="line"><a name="l00751"></a><span class="lineno">  751</span>&#160;</div>
<div class="line"><a name="l00752"></a><span class="lineno">  752</span>&#160;        <span class="keywordflow">return</span> dis0;</div>
<div class="line"><a name="l00753"></a><span class="lineno">  753</span>&#160;    }</div>
<div class="line"><a name="l00754"></a><span class="lineno">  754</span>&#160;</div>
<div class="line"><a name="l00755"></a><span class="lineno">  755</span>&#160;</div>
<div class="line"><a name="l00756"></a><span class="lineno">  756</span>&#160;};</div>
<div class="line"><a name="l00757"></a><span class="lineno">  757</span>&#160;</div>
<div class="line"><a name="l00758"></a><span class="lineno">  758</span>&#160;</div>
<div class="line"><a name="l00759"></a><span class="lineno">  759</span>&#160;</div>
<div class="line"><a name="l00760"></a><span class="lineno">  760</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">class</span> C&gt;</div>
<div class="line"><a name="l00761"></a><span class="lineno">  761</span>&#160;<span class="keyword">struct </span>KnnSearchResults {</div>
<div class="line"><a name="l00762"></a><span class="lineno">  762</span>&#160;    idx_t key;</div>
<div class="line"><a name="l00763"></a><span class="lineno">  763</span>&#160;    <span class="keyword">const</span> idx_t *ids;</div>
<div class="line"><a name="l00764"></a><span class="lineno">  764</span>&#160;</div>
<div class="line"><a name="l00765"></a><span class="lineno">  765</span>&#160;    <span class="comment">// heap params</span></div>
<div class="line"><a name="l00766"></a><span class="lineno">  766</span>&#160;    <span class="keywordtype">size_t</span> k;</div>
<div class="line"><a name="l00767"></a><span class="lineno">  767</span>&#160;    <span class="keywordtype">float</span> * heap_sim;</div>
<div class="line"><a name="l00768"></a><span class="lineno">  768</span>&#160;    <span class="keywordtype">long</span> * heap_ids;</div>
<div class="line"><a name="l00769"></a><span class="lineno">  769</span>&#160;</div>
<div class="line"><a name="l00770"></a><span class="lineno">  770</span>&#160;    <span class="keywordtype">size_t</span> nup;</div>
<div class="line"><a name="l00771"></a><span class="lineno">  771</span>&#160;</div>
<div class="line"><a name="l00772"></a><span class="lineno">  772</span>&#160;    <span class="keyword">inline</span> <span class="keywordtype">void</span> add (idx_t j, <span class="keywordtype">float</span> dis) {</div>
<div class="line"><a name="l00773"></a><span class="lineno">  773</span>&#160;        <span class="keywordflow">if</span> (C::cmp (heap_sim[0], dis)) {</div>
<div class="line"><a name="l00774"></a><span class="lineno">  774</span>&#160;            heap_pop&lt;C&gt; (k, heap_sim, heap_ids);</div>
<div class="line"><a name="l00775"></a><span class="lineno">  775</span>&#160;            <span class="keywordtype">long</span> <span class="keywordtype">id</span> = ids ? ids[j] : (key &lt;&lt; 32 | j);</div>
<div class="line"><a name="l00776"></a><span class="lineno">  776</span>&#160;            heap_push&lt;C&gt; (k, heap_sim, heap_ids, dis, id);</div>
<div class="line"><a name="l00777"></a><span class="lineno">  777</span>&#160;            nup++;</div>
<div class="line"><a name="l00778"></a><span class="lineno">  778</span>&#160;        }</div>
<div class="line"><a name="l00779"></a><span class="lineno">  779</span>&#160;    }</div>
<div class="line"><a name="l00780"></a><span class="lineno">  780</span>&#160;</div>
<div class="line"><a name="l00781"></a><span class="lineno">  781</span>&#160;};</div>
<div class="line"><a name="l00782"></a><span class="lineno">  782</span>&#160;</div>
<div class="line"><a name="l00783"></a><span class="lineno">  783</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">class</span> C&gt;</div>
<div class="line"><a name="l00784"></a><span class="lineno">  784</span>&#160;<span class="keyword">struct </span>RangeSearchResults {</div>
<div class="line"><a name="l00785"></a><span class="lineno">  785</span>&#160;    idx_t key;</div>
<div class="line"><a name="l00786"></a><span class="lineno">  786</span>&#160;    <span class="keyword">const</span> idx_t *ids;</div>
<div class="line"><a name="l00787"></a><span class="lineno">  787</span>&#160;</div>
<div class="line"><a name="l00788"></a><span class="lineno">  788</span>&#160;    <span class="comment">// wrapped result structure</span></div>
<div class="line"><a name="l00789"></a><span class="lineno">  789</span>&#160;    <span class="keywordtype">float</span> radius;</div>
<div class="line"><a name="l00790"></a><span class="lineno">  790</span>&#160;    RangeQueryResult &amp; rres;</div>
<div class="line"><a name="l00791"></a><span class="lineno">  791</span>&#160;</div>
<div class="line"><a name="l00792"></a><span class="lineno">  792</span>&#160;    <span class="keyword">inline</span> <span class="keywordtype">void</span> add (idx_t j, <span class="keywordtype">float</span> dis) {</div>
<div class="line"><a name="l00793"></a><span class="lineno">  793</span>&#160;        <span class="keywordflow">if</span> (C::cmp (radius, dis)) {</div>
<div class="line"><a name="l00794"></a><span class="lineno">  794</span>&#160;            <span class="keywordtype">long</span> <span class="keywordtype">id</span> = ids ? ids[j] : (key &lt;&lt; 32 | j);</div>
<div class="line"><a name="l00795"></a><span class="lineno">  795</span>&#160;            rres.add (dis, <span class="keywordtype">id</span>);</div>
<div class="line"><a name="l00796"></a><span class="lineno">  796</span>&#160;        }</div>
<div class="line"><a name="l00797"></a><span class="lineno">  797</span>&#160;    }</div>
<div class="line"><a name="l00798"></a><span class="lineno">  798</span>&#160;};</div>
<div class="line"><a name="l00799"></a><span class="lineno">  799</span>&#160;</div>
<div class="line"><a name="l00800"></a><span class="lineno">  800</span>&#160;</div>
<div class="line"><a name="l00801"></a><span class="lineno">  801</span>&#160;</div>
<div class="line"><a name="l00802"></a><span class="lineno">  802</span>&#160;<span class="comment">/*****************************************************</span></div>
<div class="line"><a name="l00803"></a><span class="lineno">  803</span>&#160;<span class="comment"> * Scaning the codes.</span></div>
<div class="line"><a name="l00804"></a><span class="lineno">  804</span>&#160;<span class="comment"> * The scanning functions call their favorite precompute_*</span></div>
<div class="line"><a name="l00805"></a><span class="lineno">  805</span>&#160;<span class="comment"> * function to precompute the tables they need.</span></div>
<div class="line"><a name="l00806"></a><span class="lineno">  806</span>&#160;<span class="comment"> *****************************************************/</span></div>
<div class="line"><a name="l00807"></a><span class="lineno">  807</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> IDType, MetricType METRIC_TYPE&gt;</div>
<div class="line"><a name="l00808"></a><span class="lineno">  808</span>&#160;<span class="keyword">struct </span>IVFPQScannerT: QueryTables {</div>
<div class="line"><a name="l00809"></a><span class="lineno">  809</span>&#160;</div>
<div class="line"><a name="l00810"></a><span class="lineno">  810</span>&#160;    <span class="keyword">const</span> uint8_t * list_codes;</div>
<div class="line"><a name="l00811"></a><span class="lineno">  811</span>&#160;    <span class="keyword">const</span> IDType * list_ids;</div>
<div class="line"><a name="l00812"></a><span class="lineno">  812</span>&#160;    <span class="keywordtype">size_t</span> list_size;</div>
<div class="line"><a name="l00813"></a><span class="lineno">  813</span>&#160;</div>
<div class="line"><a name="l00814"></a><span class="lineno">  814</span>&#160;    IVFPQScannerT (<span class="keyword">const</span> IndexIVFPQ &amp; ivfpq, <span class="keyword">const</span> IVFSearchParameters *params):</div>
<div class="line"><a name="l00815"></a><span class="lineno">  815</span>&#160;        QueryTables (ivfpq, params)</div>
<div class="line"><a name="l00816"></a><span class="lineno">  816</span>&#160;    {</div>
<div class="line"><a name="l00817"></a><span class="lineno">  817</span>&#160;        FAISS_THROW_IF_NOT (pq.nbits == 8);</div>
<div class="line"><a name="l00818"></a><span class="lineno">  818</span>&#160;        assert(METRIC_TYPE == metric_type);</div>
<div class="line"><a name="l00819"></a><span class="lineno">  819</span>&#160;    }</div>
<div class="line"><a name="l00820"></a><span class="lineno">  820</span>&#160;</div>
<div class="line"><a name="l00821"></a><span class="lineno">  821</span>&#160;    <span class="keywordtype">float</span> dis0;</div>
<div class="line"><a name="l00822"></a><span class="lineno">  822</span>&#160;</div>
<div class="line"><a name="l00823"></a><span class="lineno">  823</span>&#160;    <span class="keywordtype">void</span> init_list (idx_t list_no, <span class="keywordtype">float</span> coarse_dis,</div>
<div class="line"><a name="l00824"></a><span class="lineno">  824</span>&#160;                      <span class="keywordtype">int</span> mode) {</div>
<div class="line"><a name="l00825"></a><span class="lineno">  825</span>&#160;        this-&gt;key = list_no;</div>
<div class="line"><a name="l00826"></a><span class="lineno">  826</span>&#160;        this-&gt;coarse_dis = coarse_dis;</div>
<div class="line"><a name="l00827"></a><span class="lineno">  827</span>&#160;</div>
<div class="line"><a name="l00828"></a><span class="lineno">  828</span>&#160;        <span class="keywordflow">if</span> (mode == 2) {</div>
<div class="line"><a name="l00829"></a><span class="lineno">  829</span>&#160;            dis0 = precompute_list_tables ();</div>
<div class="line"><a name="l00830"></a><span class="lineno">  830</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (mode == 1) {</div>
<div class="line"><a name="l00831"></a><span class="lineno">  831</span>&#160;            dis0 = precompute_list_table_pointers ();</div>
<div class="line"><a name="l00832"></a><span class="lineno">  832</span>&#160;        }</div>
<div class="line"><a name="l00833"></a><span class="lineno">  833</span>&#160;    }</div>
<div class="line"><a name="l00834"></a><span class="lineno">  834</span>&#160;</div>
<div class="line"><a name="l00835"></a><span class="lineno">  835</span>&#160;    <span class="comment">/*****************************************************</span></div>
<div class="line"><a name="l00836"></a><span class="lineno">  836</span>&#160;<span class="comment">     * Scaning the codes: simple PQ scan.</span></div>
<div class="line"><a name="l00837"></a><span class="lineno">  837</span>&#160;<span class="comment">     *****************************************************/</span></div>
<div class="line"><a name="l00838"></a><span class="lineno">  838</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00839"></a><span class="lineno">  839</span>&#160;<span class="comment">    /// version of the scan where we use precomputed tables</span></div>
<div class="line"><a name="l00840"></a><span class="lineno">  840</span>&#160;<span class="comment"></span>    <span class="keyword">template</span>&lt;<span class="keyword">class</span> SearchResultType&gt;</div>
<div class="line"><a name="l00841"></a><span class="lineno">  841</span>&#160;    <span class="keywordtype">void</span> scan_list_with_table (<span class="keywordtype">size_t</span> ncode, <span class="keyword">const</span> uint8_t *codes,</div>
<div class="line"><a name="l00842"></a><span class="lineno">  842</span>&#160;                               SearchResultType &amp; res)<span class="keyword"> const</span></div>
<div class="line"><a name="l00843"></a><span class="lineno">  843</span>&#160;<span class="keyword">    </span>{</div>
<div class="line"><a name="l00844"></a><span class="lineno">  844</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; ncode; j++) {</div>
<div class="line"><a name="l00845"></a><span class="lineno">  845</span>&#160;</div>
<div class="line"><a name="l00846"></a><span class="lineno">  846</span>&#160;            <span class="keywordtype">float</span> dis = dis0;</div>
<div class="line"><a name="l00847"></a><span class="lineno">  847</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">float</span> *tab = sim_table;</div>
<div class="line"><a name="l00848"></a><span class="lineno">  848</span>&#160;</div>
<div class="line"><a name="l00849"></a><span class="lineno">  849</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> m = 0; m &lt; pq.M; m++) {</div>
<div class="line"><a name="l00850"></a><span class="lineno">  850</span>&#160;                dis += tab[*codes++];</div>
<div class="line"><a name="l00851"></a><span class="lineno">  851</span>&#160;                tab += pq.ksub;</div>
<div class="line"><a name="l00852"></a><span class="lineno">  852</span>&#160;            }</div>
<div class="line"><a name="l00853"></a><span class="lineno">  853</span>&#160;</div>
<div class="line"><a name="l00854"></a><span class="lineno">  854</span>&#160;            res.add(j, dis);</div>
<div class="line"><a name="l00855"></a><span class="lineno">  855</span>&#160;        }</div>
<div class="line"><a name="l00856"></a><span class="lineno">  856</span>&#160;    }</div>
<div class="line"><a name="l00857"></a><span class="lineno">  857</span>&#160;</div>
<div class="line"><a name="l00858"></a><span class="lineno">  858</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00859"></a><span class="lineno">  859</span>&#160;<span class="comment">    /// tables are not precomputed, but pointers are provided to the</span></div>
<div class="line"><a name="l00860"></a><span class="lineno">  860</span>&#160;<span class="comment">    /// relevant X_c|x_r tables</span></div>
<div class="line"><a name="l00861"></a><span class="lineno">  861</span>&#160;<span class="comment"></span>    <span class="keyword">template</span>&lt;<span class="keyword">class</span> SearchResultType&gt;</div>
<div class="line"><a name="l00862"></a><span class="lineno">  862</span>&#160;    <span class="keywordtype">void</span> scan_list_with_pointer (<span class="keywordtype">size_t</span> ncode, <span class="keyword">const</span> uint8_t *codes,</div>
<div class="line"><a name="l00863"></a><span class="lineno">  863</span>&#160;                                 SearchResultType &amp; res)<span class="keyword"> const</span></div>
<div class="line"><a name="l00864"></a><span class="lineno">  864</span>&#160;<span class="keyword">    </span>{</div>
<div class="line"><a name="l00865"></a><span class="lineno">  865</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; ncode; j++) {</div>
<div class="line"><a name="l00866"></a><span class="lineno">  866</span>&#160;</div>
<div class="line"><a name="l00867"></a><span class="lineno">  867</span>&#160;            <span class="keywordtype">float</span> dis = dis0;</div>
<div class="line"><a name="l00868"></a><span class="lineno">  868</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">float</span> *tab = sim_table_2;</div>
<div class="line"><a name="l00869"></a><span class="lineno">  869</span>&#160;</div>
<div class="line"><a name="l00870"></a><span class="lineno">  870</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> m = 0; m &lt; pq.M; m++) {</div>
<div class="line"><a name="l00871"></a><span class="lineno">  871</span>&#160;                <span class="keywordtype">int</span> ci = *codes++;</div>
<div class="line"><a name="l00872"></a><span class="lineno">  872</span>&#160;                dis += sim_table_ptrs [m][ci] - 2 * tab [ci];</div>
<div class="line"><a name="l00873"></a><span class="lineno">  873</span>&#160;                tab += pq.ksub;</div>
<div class="line"><a name="l00874"></a><span class="lineno">  874</span>&#160;            }</div>
<div class="line"><a name="l00875"></a><span class="lineno">  875</span>&#160;            res.add (j, dis);</div>
<div class="line"><a name="l00876"></a><span class="lineno">  876</span>&#160;        }</div>
<div class="line"><a name="l00877"></a><span class="lineno">  877</span>&#160;    }</div>
<div class="line"><a name="l00878"></a><span class="lineno">  878</span>&#160;</div>
<div class="line"><a name="l00879"></a><span class="lineno">  879</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00880"></a><span class="lineno">  880</span>&#160;<span class="comment">    /// nothing is precomputed: access residuals on-the-fly</span></div>
<div class="line"><a name="l00881"></a><span class="lineno">  881</span>&#160;<span class="comment"></span>    <span class="keyword">template</span>&lt;<span class="keyword">class</span> SearchResultType&gt;</div>
<div class="line"><a name="l00882"></a><span class="lineno">  882</span>&#160;    <span class="keywordtype">void</span> scan_on_the_fly_dist (<span class="keywordtype">size_t</span> ncode, <span class="keyword">const</span> uint8_t *codes,</div>
<div class="line"><a name="l00883"></a><span class="lineno">  883</span>&#160;                                 SearchResultType &amp;res)<span class="keyword"> const</span></div>
<div class="line"><a name="l00884"></a><span class="lineno">  884</span>&#160;<span class="keyword">    </span>{</div>
<div class="line"><a name="l00885"></a><span class="lineno">  885</span>&#160;        <span class="keyword">const</span> <span class="keywordtype">float</span> *dvec;</div>
<div class="line"><a name="l00886"></a><span class="lineno">  886</span>&#160;        <span class="keywordtype">float</span> dis0 = 0;</div>
<div class="line"><a name="l00887"></a><span class="lineno">  887</span>&#160;        <span class="keywordflow">if</span> (by_residual) {</div>
<div class="line"><a name="l00888"></a><span class="lineno">  888</span>&#160;            <span class="keywordflow">if</span> (METRIC_TYPE == METRIC_INNER_PRODUCT) {</div>
<div class="line"><a name="l00889"></a><span class="lineno">  889</span>&#160;                ivfpq.quantizer-&gt;reconstruct (key, residual_vec);</div>
<div class="line"><a name="l00890"></a><span class="lineno">  890</span>&#160;                dis0 = fvec_inner_product (residual_vec, qi, d);</div>
<div class="line"><a name="l00891"></a><span class="lineno">  891</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00892"></a><span class="lineno">  892</span>&#160;                ivfpq.quantizer-&gt;compute_residual (qi, residual_vec, key);</div>
<div class="line"><a name="l00893"></a><span class="lineno">  893</span>&#160;            }</div>
<div class="line"><a name="l00894"></a><span class="lineno">  894</span>&#160;            dvec = residual_vec;</div>
<div class="line"><a name="l00895"></a><span class="lineno">  895</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00896"></a><span class="lineno">  896</span>&#160;            dvec = qi;</div>
<div class="line"><a name="l00897"></a><span class="lineno">  897</span>&#160;            dis0 = 0;</div>
<div class="line"><a name="l00898"></a><span class="lineno">  898</span>&#160;        }</div>
<div class="line"><a name="l00899"></a><span class="lineno">  899</span>&#160;</div>
<div class="line"><a name="l00900"></a><span class="lineno">  900</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; ncode; j++) {</div>
<div class="line"><a name="l00901"></a><span class="lineno">  901</span>&#160;</div>
<div class="line"><a name="l00902"></a><span class="lineno">  902</span>&#160;            pq.decode (codes, decoded_vec);</div>
<div class="line"><a name="l00903"></a><span class="lineno">  903</span>&#160;            codes += pq.code_size;</div>
<div class="line"><a name="l00904"></a><span class="lineno">  904</span>&#160;</div>
<div class="line"><a name="l00905"></a><span class="lineno">  905</span>&#160;            <span class="keywordtype">float</span> dis;</div>
<div class="line"><a name="l00906"></a><span class="lineno">  906</span>&#160;            <span class="keywordflow">if</span> (METRIC_TYPE == METRIC_INNER_PRODUCT) {</div>
<div class="line"><a name="l00907"></a><span class="lineno">  907</span>&#160;                dis = dis0 + fvec_inner_product (decoded_vec, qi, d);</div>
<div class="line"><a name="l00908"></a><span class="lineno">  908</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00909"></a><span class="lineno">  909</span>&#160;                dis = <a class="code" href="namespacefaiss.html#a7466bd32de31640860393a701eaac5ad">fvec_L2sqr</a> (decoded_vec, dvec, d);</div>
<div class="line"><a name="l00910"></a><span class="lineno">  910</span>&#160;            }</div>
<div class="line"><a name="l00911"></a><span class="lineno">  911</span>&#160;            res.add (j, dis);</div>
<div class="line"><a name="l00912"></a><span class="lineno">  912</span>&#160;        }</div>
<div class="line"><a name="l00913"></a><span class="lineno">  913</span>&#160;    }</div>
<div class="line"><a name="l00914"></a><span class="lineno">  914</span>&#160;</div>
<div class="line"><a name="l00915"></a><span class="lineno">  915</span>&#160;    <span class="comment">/*****************************************************</span></div>
<div class="line"><a name="l00916"></a><span class="lineno">  916</span>&#160;<span class="comment">     * Scanning codes with polysemous filtering</span></div>
<div class="line"><a name="l00917"></a><span class="lineno">  917</span>&#160;<span class="comment">     *****************************************************/</span></div>
<div class="line"><a name="l00918"></a><span class="lineno">  918</span>&#160;</div>
<div class="line"><a name="l00919"></a><span class="lineno">  919</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">class</span> HammingComputer, <span class="keyword">class</span> SearchResultType&gt;</div>
<div class="line"><a name="l00920"></a><span class="lineno">  920</span>&#160;    <span class="keywordtype">void</span> scan_list_polysemous_hc (</div>
<div class="line"><a name="l00921"></a><span class="lineno">  921</span>&#160;             <span class="keywordtype">size_t</span> ncode, <span class="keyword">const</span> uint8_t *codes,</div>
<div class="line"><a name="l00922"></a><span class="lineno">  922</span>&#160;             SearchResultType &amp; res)<span class="keyword"> const</span></div>
<div class="line"><a name="l00923"></a><span class="lineno">  923</span>&#160;<span class="keyword">    </span>{</div>
<div class="line"><a name="l00924"></a><span class="lineno">  924</span>&#160;        <span class="keywordtype">int</span> ht = ivfpq.polysemous_ht;</div>
<div class="line"><a name="l00925"></a><span class="lineno">  925</span>&#160;        <span class="keywordtype">size_t</span> n_hamming_pass = 0, nup = 0;</div>
<div class="line"><a name="l00926"></a><span class="lineno">  926</span>&#160;</div>
<div class="line"><a name="l00927"></a><span class="lineno">  927</span>&#160;        <span class="keywordtype">int</span> code_size = pq.code_size;</div>
<div class="line"><a name="l00928"></a><span class="lineno">  928</span>&#160;</div>
<div class="line"><a name="l00929"></a><span class="lineno">  929</span>&#160;        HammingComputer hc (q_code.data(), code_size);</div>
<div class="line"><a name="l00930"></a><span class="lineno">  930</span>&#160;</div>
<div class="line"><a name="l00931"></a><span class="lineno">  931</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; ncode; j++) {</div>
<div class="line"><a name="l00932"></a><span class="lineno">  932</span>&#160;            <span class="keyword">const</span> uint8_t *b_code = codes;</div>
<div class="line"><a name="l00933"></a><span class="lineno">  933</span>&#160;            <span class="keywordtype">int</span> hd = hc.hamming (b_code);</div>
<div class="line"><a name="l00934"></a><span class="lineno">  934</span>&#160;            <span class="keywordflow">if</span> (hd &lt; ht) {</div>
<div class="line"><a name="l00935"></a><span class="lineno">  935</span>&#160;                n_hamming_pass ++;</div>
<div class="line"><a name="l00936"></a><span class="lineno">  936</span>&#160;</div>
<div class="line"><a name="l00937"></a><span class="lineno">  937</span>&#160;                <span class="keywordtype">float</span> dis = dis0;</div>
<div class="line"><a name="l00938"></a><span class="lineno">  938</span>&#160;                <span class="keyword">const</span> <span class="keywordtype">float</span> *tab = sim_table;</div>
<div class="line"><a name="l00939"></a><span class="lineno">  939</span>&#160;</div>
<div class="line"><a name="l00940"></a><span class="lineno">  940</span>&#160;                <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> m = 0; m &lt; pq.M; m++) {</div>
<div class="line"><a name="l00941"></a><span class="lineno">  941</span>&#160;                    dis += tab[*b_code++];</div>
<div class="line"><a name="l00942"></a><span class="lineno">  942</span>&#160;                    tab += pq.ksub;</div>
<div class="line"><a name="l00943"></a><span class="lineno">  943</span>&#160;                }</div>
<div class="line"><a name="l00944"></a><span class="lineno">  944</span>&#160;</div>
<div class="line"><a name="l00945"></a><span class="lineno">  945</span>&#160;                res.add (j, dis);</div>
<div class="line"><a name="l00946"></a><span class="lineno">  946</span>&#160;            }</div>
<div class="line"><a name="l00947"></a><span class="lineno">  947</span>&#160;            codes += code_size;</div>
<div class="line"><a name="l00948"></a><span class="lineno">  948</span>&#160;        }</div>
<div class="line"><a name="l00949"></a><span class="lineno">  949</span>&#160;<span class="preprocessor">#pragma omp critical</span></div>
<div class="line"><a name="l00950"></a><span class="lineno">  950</span>&#160;<span class="preprocessor"></span>        {</div>
<div class="line"><a name="l00951"></a><span class="lineno">  951</span>&#160;            indexIVFPQ_stats.n_hamming_pass += n_hamming_pass;</div>
<div class="line"><a name="l00952"></a><span class="lineno">  952</span>&#160;        }</div>
<div class="line"><a name="l00953"></a><span class="lineno">  953</span>&#160;    }</div>
<div class="line"><a name="l00954"></a><span class="lineno">  954</span>&#160;</div>
<div class="line"><a name="l00955"></a><span class="lineno">  955</span>&#160;    <span class="keyword">template</span>&lt;<span class="keyword">class</span> SearchResultType&gt;</div>
<div class="line"><a name="l00956"></a><span class="lineno">  956</span>&#160;    <span class="keywordtype">void</span> scan_list_polysemous (</div>
<div class="line"><a name="l00957"></a><span class="lineno">  957</span>&#160;             <span class="keywordtype">size_t</span> ncode, <span class="keyword">const</span> uint8_t *codes,</div>
<div class="line"><a name="l00958"></a><span class="lineno">  958</span>&#160;             SearchResultType &amp;res)<span class="keyword"> const</span></div>
<div class="line"><a name="l00959"></a><span class="lineno">  959</span>&#160;<span class="keyword">    </span>{</div>
<div class="line"><a name="l00960"></a><span class="lineno">  960</span>&#160;        <span class="keywordflow">switch</span> (pq.code_size) {</div>
<div class="line"><a name="l00961"></a><span class="lineno">  961</span>&#160;<span class="preprocessor">#define HANDLE_CODE_SIZE(cs)                                            \</span></div>
<div class="line"><a name="l00962"></a><span class="lineno">  962</span>&#160;<span class="preprocessor">        case cs:                                                        \</span></div>
<div class="line"><a name="l00963"></a><span class="lineno">  963</span>&#160;<span class="preprocessor">            scan_list_polysemous_hc \</span></div>
<div class="line"><a name="l00964"></a><span class="lineno">  964</span>&#160;<span class="preprocessor">            &lt;HammingComputer ## cs, SearchResultType&gt;   \</span></div>
<div class="line"><a name="l00965"></a><span class="lineno">  965</span>&#160;<span class="preprocessor">                (ncode, codes, res);             \</span></div>
<div class="line"><a name="l00966"></a><span class="lineno">  966</span>&#160;<span class="preprocessor">            break</span></div>
<div class="line"><a name="l00967"></a><span class="lineno">  967</span>&#160;<span class="preprocessor"></span>        HANDLE_CODE_SIZE(4);</div>
<div class="line"><a name="l00968"></a><span class="lineno">  968</span>&#160;        HANDLE_CODE_SIZE(8);</div>
<div class="line"><a name="l00969"></a><span class="lineno">  969</span>&#160;        HANDLE_CODE_SIZE(16);</div>
<div class="line"><a name="l00970"></a><span class="lineno">  970</span>&#160;        HANDLE_CODE_SIZE(20);</div>
<div class="line"><a name="l00971"></a><span class="lineno">  971</span>&#160;        HANDLE_CODE_SIZE(32);</div>
<div class="line"><a name="l00972"></a><span class="lineno">  972</span>&#160;        HANDLE_CODE_SIZE(64);</div>
<div class="line"><a name="l00973"></a><span class="lineno">  973</span>&#160;<span class="preprocessor">#undef HANDLE_CODE_SIZE</span></div>
<div class="line"><a name="l00974"></a><span class="lineno">  974</span>&#160;<span class="preprocessor"></span>        <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00975"></a><span class="lineno">  975</span>&#160;            <span class="keywordflow">if</span> (pq.code_size % 8 == 0)</div>
<div class="line"><a name="l00976"></a><span class="lineno">  976</span>&#160;                scan_list_polysemous_hc</div>
<div class="line"><a name="l00977"></a><span class="lineno">  977</span>&#160;                    &lt;HammingComputerM8, SearchResultType&gt;</div>
<div class="line"><a name="l00978"></a><span class="lineno">  978</span>&#160;                    (ncode, codes, res);</div>
<div class="line"><a name="l00979"></a><span class="lineno">  979</span>&#160;            <span class="keywordflow">else</span></div>
<div class="line"><a name="l00980"></a><span class="lineno">  980</span>&#160;                scan_list_polysemous_hc</div>
<div class="line"><a name="l00981"></a><span class="lineno">  981</span>&#160;                    &lt;HammingComputerM4, SearchResultType&gt;</div>
<div class="line"><a name="l00982"></a><span class="lineno">  982</span>&#160;                    (ncode, codes, res);</div>
<div class="line"><a name="l00983"></a><span class="lineno">  983</span>&#160;            <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00984"></a><span class="lineno">  984</span>&#160;        }</div>
<div class="line"><a name="l00985"></a><span class="lineno">  985</span>&#160;    }</div>
<div class="line"><a name="l00986"></a><span class="lineno">  986</span>&#160;</div>
<div class="line"><a name="l00987"></a><span class="lineno">  987</span>&#160;};</div>
<div class="line"><a name="l00988"></a><span class="lineno">  988</span>&#160;</div>
<div class="line"><a name="l00989"></a><span class="lineno">  989</span>&#160;</div>
<div class="line"><a name="l00990"></a><span class="lineno">  990</span>&#160;<span class="comment">/* We put as many parameters as possible in template. Hopefully the</span></div>
<div class="line"><a name="l00991"></a><span class="lineno">  991</span>&#160;<span class="comment"> * gain in runtime is worth the code bloat. C is the comparator &lt; or</span></div>
<div class="line"><a name="l00992"></a><span class="lineno">  992</span>&#160;<span class="comment"> * &gt;, it is directly related to METRIC_TYPE. precompute_mode is how</span></div>
<div class="line"><a name="l00993"></a><span class="lineno">  993</span>&#160;<span class="comment"> * much we precompute (2 = precompute distance tables, 1 = precompute</span></div>
<div class="line"><a name="l00994"></a><span class="lineno">  994</span>&#160;<span class="comment"> * pointers to distances, 0 = compute distances one by one).</span></div>
<div class="line"><a name="l00995"></a><span class="lineno">  995</span>&#160;<span class="comment"> * Currently only 2 is supported */</span></div>
<div class="line"><a name="l00996"></a><span class="lineno">  996</span>&#160;<span class="keyword">template</span>&lt;MetricType METRIC_TYPE, <span class="keyword">class</span> C, <span class="keywordtype">int</span> precompute_mode&gt;</div>
<div class="line"><a name="l00997"></a><span class="lineno">  997</span>&#160;<span class="keyword">struct </span>IVFPQScanner:</div>
<div class="line"><a name="l00998"></a><span class="lineno">  998</span>&#160;    IVFPQScannerT&lt;Index::idx_t, METRIC_TYPE&gt;,</div>
<div class="line"><a name="l00999"></a><span class="lineno">  999</span>&#160;    InvertedListScanner</div>
<div class="line"><a name="l01000"></a><span class="lineno"> 1000</span>&#160;{</div>
<div class="line"><a name="l01001"></a><span class="lineno"> 1001</span>&#160;    <span class="keywordtype">bool</span> store_pairs;</div>
<div class="line"><a name="l01002"></a><span class="lineno"> 1002</span>&#160;</div>
<div class="line"><a name="l01003"></a><span class="lineno"> 1003</span>&#160;    IVFPQScanner(<span class="keyword">const</span> IndexIVFPQ &amp; ivfpq, <span class="keywordtype">bool</span> store_pairs):</div>
<div class="line"><a name="l01004"></a><span class="lineno"> 1004</span>&#160;        IVFPQScannerT&lt;Index::idx_t, METRIC_TYPE&gt;(ivfpq, nullptr),</div>
<div class="line"><a name="l01005"></a><span class="lineno"> 1005</span>&#160;        store_pairs(store_pairs)</div>
<div class="line"><a name="l01006"></a><span class="lineno"> 1006</span>&#160;    {</div>
<div class="line"><a name="l01007"></a><span class="lineno"> 1007</span>&#160;    }</div>
<div class="line"><a name="l01008"></a><span class="lineno"> 1008</span>&#160;</div>
<div class="line"><a name="l01009"></a><span class="lineno"> 1009</span>&#160;    <span class="keywordtype">void</span> set_query (<span class="keyword">const</span> <span class="keywordtype">float</span> *query)<span class="keyword"> override </span>{</div>
<div class="line"><a name="l01010"></a><span class="lineno"> 1010</span>&#160;        this-&gt;init_query (query);</div>
<div class="line"><a name="l01011"></a><span class="lineno"> 1011</span>&#160;    }</div>
<div class="line"><a name="l01012"></a><span class="lineno"> 1012</span>&#160;</div>
<div class="line"><a name="l01013"></a><span class="lineno"> 1013</span>&#160;    <span class="keywordtype">void</span> set_list (idx_t list_no, <span class="keywordtype">float</span> coarse_dis)<span class="keyword"> override </span>{</div>
<div class="line"><a name="l01014"></a><span class="lineno"> 1014</span>&#160;        this-&gt;init_list (list_no, coarse_dis, precompute_mode);</div>
<div class="line"><a name="l01015"></a><span class="lineno"> 1015</span>&#160;    }</div>
<div class="line"><a name="l01016"></a><span class="lineno"> 1016</span>&#160;</div>
<div class="line"><a name="l01017"></a><span class="lineno"> 1017</span>&#160;    <span class="keywordtype">float</span> distance_to_code (<span class="keyword">const</span> uint8_t *code)<span class="keyword"> const override </span>{</div>
<div class="line"><a name="l01018"></a><span class="lineno"> 1018</span>&#160;        assert(precompute_mode == 2);</div>
<div class="line"><a name="l01019"></a><span class="lineno"> 1019</span>&#160;        <span class="keywordtype">float</span> dis = this-&gt;dis0;</div>
<div class="line"><a name="l01020"></a><span class="lineno"> 1020</span>&#160;        <span class="keyword">const</span> <span class="keywordtype">float</span> *tab = this-&gt;sim_table;</div>
<div class="line"><a name="l01021"></a><span class="lineno"> 1021</span>&#160;</div>
<div class="line"><a name="l01022"></a><span class="lineno"> 1022</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> m = 0; m &lt; this-&gt;pq.M; m++) {</div>
<div class="line"><a name="l01023"></a><span class="lineno"> 1023</span>&#160;            dis += tab[*code++];</div>
<div class="line"><a name="l01024"></a><span class="lineno"> 1024</span>&#160;            tab += this-&gt;pq.ksub;</div>
<div class="line"><a name="l01025"></a><span class="lineno"> 1025</span>&#160;        }</div>
<div class="line"><a name="l01026"></a><span class="lineno"> 1026</span>&#160;        <span class="keywordflow">return</span> dis;</div>
<div class="line"><a name="l01027"></a><span class="lineno"> 1027</span>&#160;    }</div>
<div class="line"><a name="l01028"></a><span class="lineno"> 1028</span>&#160;</div>
<div class="line"><a name="l01029"></a><span class="lineno"> 1029</span>&#160;    <span class="keywordtype">size_t</span> scan_codes (<span class="keywordtype">size_t</span> ncode,</div>
<div class="line"><a name="l01030"></a><span class="lineno"> 1030</span>&#160;                       <span class="keyword">const</span> uint8_t *codes,</div>
<div class="line"><a name="l01031"></a><span class="lineno"> 1031</span>&#160;                       <span class="keyword">const</span> idx_t *ids,</div>
<div class="line"><a name="l01032"></a><span class="lineno"> 1032</span>&#160;                       <span class="keywordtype">float</span> *heap_sim, idx_t *heap_ids,</div>
<div class="line"><a name="l01033"></a><span class="lineno"> 1033</span>&#160;                       <span class="keywordtype">size_t</span> k)<span class="keyword"> const override</span></div>
<div class="line"><a name="l01034"></a><span class="lineno"> 1034</span>&#160;<span class="keyword">    </span>{</div>
<div class="line"><a name="l01035"></a><span class="lineno"> 1035</span>&#160;        KnnSearchResults&lt;C&gt; res = {</div>
<div class="line"><a name="l01036"></a><span class="lineno"> 1036</span>&#160;            <span class="comment">/* key */</span>      this-&gt;key,</div>
<div class="line"><a name="l01037"></a><span class="lineno"> 1037</span>&#160;            <span class="comment">/* ids */</span>      this-&gt;store_pairs ? <span class="keyword">nullptr</span> : ids,</div>
<div class="line"><a name="l01038"></a><span class="lineno"> 1038</span>&#160;            <span class="comment">/* k */</span>        k,</div>
<div class="line"><a name="l01039"></a><span class="lineno"> 1039</span>&#160;            <span class="comment">/* heap_sim */</span> heap_sim,</div>
<div class="line"><a name="l01040"></a><span class="lineno"> 1040</span>&#160;            <span class="comment">/* heap_ids */</span> heap_ids,</div>
<div class="line"><a name="l01041"></a><span class="lineno"> 1041</span>&#160;            <span class="comment">/* nup */</span>      0</div>
<div class="line"><a name="l01042"></a><span class="lineno"> 1042</span>&#160;        };</div>
<div class="line"><a name="l01043"></a><span class="lineno"> 1043</span>&#160;</div>
<div class="line"><a name="l01044"></a><span class="lineno"> 1044</span>&#160;        <span class="keywordflow">if</span> (this-&gt;polysemous_ht &gt; 0) {</div>
<div class="line"><a name="l01045"></a><span class="lineno"> 1045</span>&#160;            assert(precompute_mode == 2);</div>
<div class="line"><a name="l01046"></a><span class="lineno"> 1046</span>&#160;            this-&gt;scan_list_polysemous (ncode, codes, res);</div>
<div class="line"><a name="l01047"></a><span class="lineno"> 1047</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (precompute_mode == 2) {</div>
<div class="line"><a name="l01048"></a><span class="lineno"> 1048</span>&#160;            this-&gt;scan_list_with_table (ncode, codes, res);</div>
<div class="line"><a name="l01049"></a><span class="lineno"> 1049</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (precompute_mode == 1) {</div>
<div class="line"><a name="l01050"></a><span class="lineno"> 1050</span>&#160;            this-&gt;scan_list_with_pointer (ncode, codes, res);</div>
<div class="line"><a name="l01051"></a><span class="lineno"> 1051</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (precompute_mode == 0) {</div>
<div class="line"><a name="l01052"></a><span class="lineno"> 1052</span>&#160;            this-&gt;scan_on_the_fly_dist (ncode, codes, res);</div>
<div class="line"><a name="l01053"></a><span class="lineno"> 1053</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01054"></a><span class="lineno"> 1054</span>&#160;            FAISS_THROW_MSG(<span class="stringliteral">&quot;bad precomp mode&quot;</span>);</div>
<div class="line"><a name="l01055"></a><span class="lineno"> 1055</span>&#160;        }</div>
<div class="line"><a name="l01056"></a><span class="lineno"> 1056</span>&#160;        <span class="keywordflow">return</span> res.nup;</div>
<div class="line"><a name="l01057"></a><span class="lineno"> 1057</span>&#160;    }</div>
<div class="line"><a name="l01058"></a><span class="lineno"> 1058</span>&#160;</div>
<div class="line"><a name="l01059"></a><span class="lineno"> 1059</span>&#160;    <span class="keywordtype">void</span> scan_codes_range (<span class="keywordtype">size_t</span> ncode,</div>
<div class="line"><a name="l01060"></a><span class="lineno"> 1060</span>&#160;                           <span class="keyword">const</span> uint8_t *codes,</div>
<div class="line"><a name="l01061"></a><span class="lineno"> 1061</span>&#160;                           <span class="keyword">const</span> idx_t *ids,</div>
<div class="line"><a name="l01062"></a><span class="lineno"> 1062</span>&#160;                           <span class="keywordtype">float</span> radius,</div>
<div class="line"><a name="l01063"></a><span class="lineno"> 1063</span>&#160;                           RangeQueryResult &amp; rres)<span class="keyword"> const override</span></div>
<div class="line"><a name="l01064"></a><span class="lineno"> 1064</span>&#160;<span class="keyword">    </span>{</div>
<div class="line"><a name="l01065"></a><span class="lineno"> 1065</span>&#160;        RangeSearchResults&lt;C&gt; res = {</div>
<div class="line"><a name="l01066"></a><span class="lineno"> 1066</span>&#160;            <span class="comment">/* key */</span>      this-&gt;key,</div>
<div class="line"><a name="l01067"></a><span class="lineno"> 1067</span>&#160;            <span class="comment">/* ids */</span>      this-&gt;store_pairs ? <span class="keyword">nullptr</span> : ids,</div>
<div class="line"><a name="l01068"></a><span class="lineno"> 1068</span>&#160;            <span class="comment">/* radius */</span>   radius,</div>
<div class="line"><a name="l01069"></a><span class="lineno"> 1069</span>&#160;            <span class="comment">/* rres */</span>     rres</div>
<div class="line"><a name="l01070"></a><span class="lineno"> 1070</span>&#160;        };</div>
<div class="line"><a name="l01071"></a><span class="lineno"> 1071</span>&#160;</div>
<div class="line"><a name="l01072"></a><span class="lineno"> 1072</span>&#160;        <span class="keywordflow">if</span> (this-&gt;polysemous_ht &gt; 0) {</div>
<div class="line"><a name="l01073"></a><span class="lineno"> 1073</span>&#160;            assert(precompute_mode == 2);</div>
<div class="line"><a name="l01074"></a><span class="lineno"> 1074</span>&#160;            this-&gt;scan_list_polysemous (ncode, codes, res);</div>
<div class="line"><a name="l01075"></a><span class="lineno"> 1075</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (precompute_mode == 2) {</div>
<div class="line"><a name="l01076"></a><span class="lineno"> 1076</span>&#160;            this-&gt;scan_list_with_table (ncode, codes, res);</div>
<div class="line"><a name="l01077"></a><span class="lineno"> 1077</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (precompute_mode == 1) {</div>
<div class="line"><a name="l01078"></a><span class="lineno"> 1078</span>&#160;            this-&gt;scan_list_with_pointer (ncode, codes, res);</div>
<div class="line"><a name="l01079"></a><span class="lineno"> 1079</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (precompute_mode == 0) {</div>
<div class="line"><a name="l01080"></a><span class="lineno"> 1080</span>&#160;            this-&gt;scan_on_the_fly_dist (ncode, codes, res);</div>
<div class="line"><a name="l01081"></a><span class="lineno"> 1081</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01082"></a><span class="lineno"> 1082</span>&#160;            FAISS_THROW_MSG(<span class="stringliteral">&quot;bad precomp mode&quot;</span>);</div>
<div class="line"><a name="l01083"></a><span class="lineno"> 1083</span>&#160;        }</div>
<div class="line"><a name="l01084"></a><span class="lineno"> 1084</span>&#160;</div>
<div class="line"><a name="l01085"></a><span class="lineno"> 1085</span>&#160;    }</div>
<div class="line"><a name="l01086"></a><span class="lineno"> 1086</span>&#160;};</div>
<div class="line"><a name="l01087"></a><span class="lineno"> 1087</span>&#160;</div>
<div class="line"><a name="l01088"></a><span class="lineno"> 1088</span>&#160;</div>
<div class="line"><a name="l01089"></a><span class="lineno"> 1089</span>&#160;</div>
<div class="line"><a name="l01090"></a><span class="lineno"> 1090</span>&#160;</div>
<div class="line"><a name="l01091"></a><span class="lineno"> 1091</span>&#160;} <span class="comment">// anonymous namespace</span></div>
<div class="line"><a name="l01092"></a><span class="lineno"> 1092</span>&#160;</div>
<div class="line"><a name="l01093"></a><span class="lineno"> 1093</span>&#160;InvertedListScanner *</div>
<div class="line"><a name="l01094"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#a694b699dd3512d83743d717e489bd48c"> 1094</a></span>&#160;<a class="code" href="structfaiss_1_1IndexIVFPQ.html#a694b699dd3512d83743d717e489bd48c">IndexIVFPQ::get_InvertedListScanner</a> (<span class="keywordtype">bool</span> store_pairs)<span class="keyword"> const</span></div>
<div class="line"><a name="l01095"></a><span class="lineno"> 1095</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l01096"></a><span class="lineno"> 1096</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_INNER_PRODUCT) {</div>
<div class="line"><a name="l01097"></a><span class="lineno"> 1097</span>&#160;        <span class="keywordflow">return</span> <span class="keyword">new</span> IVFPQScanner&lt;METRIC_INNER_PRODUCT, CMin&lt;float, long&gt;, 2&gt;</div>
<div class="line"><a name="l01098"></a><span class="lineno"> 1098</span>&#160;            (*<span class="keyword">this</span>, store_pairs);</div>
<div class="line"><a name="l01099"></a><span class="lineno"> 1099</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_L2) {</div>
<div class="line"><a name="l01100"></a><span class="lineno"> 1100</span>&#160;        <span class="keywordflow">return</span> <span class="keyword">new</span> IVFPQScanner&lt;METRIC_L2, CMax&lt;float, long&gt;, 2&gt;</div>
<div class="line"><a name="l01101"></a><span class="lineno"> 1101</span>&#160;            (*<span class="keyword">this</span>, store_pairs);</div>
<div class="line"><a name="l01102"></a><span class="lineno"> 1102</span>&#160;    }</div>
<div class="line"><a name="l01103"></a><span class="lineno"> 1103</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l01104"></a><span class="lineno"> 1104</span>&#160;</div>
<div class="line"><a name="l01105"></a><span class="lineno"> 1105</span>&#160;}</div>
<div class="line"><a name="l01106"></a><span class="lineno"> 1106</span>&#160;</div>
<div class="line"><a name="l01107"></a><span class="lineno"> 1107</span>&#160;</div>
<div class="line"><a name="l01108"></a><span class="lineno"> 1108</span>&#160;</div>
<div class="line"><a name="l01109"></a><span class="lineno"> 1109</span>&#160;<a class="code" href="structfaiss_1_1IndexIVFPQStats.html">IndexIVFPQStats</a> indexIVFPQ_stats;</div>
<div class="line"><a name="l01110"></a><span class="lineno"> 1110</span>&#160;</div>
<div class="line"><a name="l01111"></a><span class="lineno"> 1111</span>&#160;<span class="keywordtype">void</span> IndexIVFPQStats::reset () {</div>
<div class="line"><a name="l01112"></a><span class="lineno"> 1112</span>&#160;    memset (<span class="keyword">this</span>, 0, <span class="keyword">sizeof</span> (*<span class="keyword">this</span>));</div>
<div class="line"><a name="l01113"></a><span class="lineno"> 1113</span>&#160;}</div>
<div class="line"><a name="l01114"></a><span class="lineno"> 1114</span>&#160;</div>
<div class="line"><a name="l01115"></a><span class="lineno"> 1115</span>&#160;</div>
<div class="line"><a name="l01116"></a><span class="lineno"> 1116</span>&#160;</div>
<div class="line"><a name="l01117"></a><span class="lineno"> 1117</span>&#160;IndexIVFPQ::IndexIVFPQ ()</div>
<div class="line"><a name="l01118"></a><span class="lineno"> 1118</span>&#160;{</div>
<div class="line"><a name="l01119"></a><span class="lineno"> 1119</span>&#160;    <span class="comment">// initialize some runtime values</span></div>
<div class="line"><a name="l01120"></a><span class="lineno"> 1120</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a> = 0;</div>
<div class="line"><a name="l01121"></a><span class="lineno"> 1121</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a7430fc4fa030c96497abced3b68358d4">scan_table_threshold</a> = 0;</div>
<div class="line"><a name="l01122"></a><span class="lineno"> 1122</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a9d5373633df7a9bec4de69400b9adeed">do_polysemous_training</a> = <span class="keyword">false</span>;</div>
<div class="line"><a name="l01123"></a><span class="lineno"> 1123</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a3093a0a3e128eafce6e0583b75e9662e">polysemous_ht</a> = 0;</div>
<div class="line"><a name="l01124"></a><span class="lineno"> 1124</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a2b14cbb5acb3fc28a4df8fde3f5567cd">polysemous_training</a> = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l01125"></a><span class="lineno"> 1125</span>&#160;}</div>
<div class="line"><a name="l01126"></a><span class="lineno"> 1126</span>&#160;</div>
<div class="line"><a name="l01127"></a><span class="lineno"> 1127</span>&#160;</div>
<div class="line"><a name="l01128"></a><span class="lineno"><a class="line" href="structfaiss_1_1CodeCmp.html"> 1128</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1CodeCmp.html">CodeCmp</a> {</div>
<div class="line"><a name="l01129"></a><span class="lineno"> 1129</span>&#160;    <span class="keyword">const</span> uint8_t *tab;</div>
<div class="line"><a name="l01130"></a><span class="lineno"> 1130</span>&#160;    <span class="keywordtype">size_t</span> code_size;</div>
<div class="line"><a name="l01131"></a><span class="lineno"> 1131</span>&#160;    <span class="keywordtype">bool</span> operator () (<span class="keywordtype">int</span> a, <span class="keywordtype">int</span> b)<span class="keyword"> const </span>{</div>
<div class="line"><a name="l01132"></a><span class="lineno"> 1132</span>&#160;        <span class="keywordflow">return</span> cmp (a, b) &gt; 0;</div>
<div class="line"><a name="l01133"></a><span class="lineno"> 1133</span>&#160;    }</div>
<div class="line"><a name="l01134"></a><span class="lineno"> 1134</span>&#160;    <span class="keywordtype">int</span> cmp (<span class="keywordtype">int</span> a, <span class="keywordtype">int</span> b)<span class="keyword"> const </span>{</div>
<div class="line"><a name="l01135"></a><span class="lineno"> 1135</span>&#160;        <span class="keywordflow">return</span> memcmp (tab + a * code_size, tab + b * code_size,</div>
<div class="line"><a name="l01136"></a><span class="lineno"> 1136</span>&#160;                       code_size);</div>
<div class="line"><a name="l01137"></a><span class="lineno"> 1137</span>&#160;    }</div>
<div class="line"><a name="l01138"></a><span class="lineno"> 1138</span>&#160;};</div>
<div class="line"><a name="l01139"></a><span class="lineno"> 1139</span>&#160;</div>
<div class="line"><a name="l01140"></a><span class="lineno"> 1140</span>&#160;</div>
<div class="line"><a name="l01141"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQ.html#aee355b57acde203a3caed46a93e16a3c"> 1141</a></span>&#160;<span class="keywordtype">size_t</span> <a class="code" href="structfaiss_1_1IndexIVFPQ.html#aee355b57acde203a3caed46a93e16a3c">IndexIVFPQ::find_duplicates</a> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *dup_ids, <span class="keywordtype">size_t</span> *lims)<span class="keyword"> const</span></div>
<div class="line"><a name="l01142"></a><span class="lineno"> 1142</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l01143"></a><span class="lineno"> 1143</span>&#160;    <span class="keywordtype">size_t</span> ngroup = 0;</div>
<div class="line"><a name="l01144"></a><span class="lineno"> 1144</span>&#160;    lims[0] = 0;</div>
<div class="line"><a name="l01145"></a><span class="lineno"> 1145</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> list_no = 0; list_no &lt; <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>; list_no++) {</div>
<div class="line"><a name="l01146"></a><span class="lineno"> 1146</span>&#160;        <span class="keywordtype">size_t</span> n = <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a9bd256053ee360473842105460fe285f">list_size</a> (list_no);</div>
<div class="line"><a name="l01147"></a><span class="lineno"> 1147</span>&#160;        std::vector&lt;int&gt; ord (n);</div>
<div class="line"><a name="l01148"></a><span class="lineno"> 1148</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; n; i++) ord[i] = i;</div>
<div class="line"><a name="l01149"></a><span class="lineno"> 1149</span>&#160;        <a class="code" href="structfaiss_1_1InvertedLists_1_1ScopedCodes.html">InvertedLists::ScopedCodes</a> codes (<a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>, list_no);</div>
<div class="line"><a name="l01150"></a><span class="lineno"> 1150</span>&#160;        <a class="code" href="structfaiss_1_1CodeCmp.html">CodeCmp</a> cs = { codes.get(), code_size };</div>
<div class="line"><a name="l01151"></a><span class="lineno"> 1151</span>&#160;        std::sort (ord.begin(), ord.end(), cs);</div>
<div class="line"><a name="l01152"></a><span class="lineno"> 1152</span>&#160;</div>
<div class="line"><a name="l01153"></a><span class="lineno"> 1153</span>&#160;        <a class="code" href="structfaiss_1_1InvertedLists_1_1ScopedIds.html">InvertedLists::ScopedIds</a> list_ids (<a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>, list_no);</div>
<div class="line"><a name="l01154"></a><span class="lineno"> 1154</span>&#160;        <span class="keywordtype">int</span> prev = -1;  <span class="comment">// all elements from prev to i-1 are equal</span></div>
<div class="line"><a name="l01155"></a><span class="lineno"> 1155</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; n; i++) {</div>
<div class="line"><a name="l01156"></a><span class="lineno"> 1156</span>&#160;            <span class="keywordflow">if</span> (prev &gt;= 0 &amp;&amp; cs.cmp (ord [prev], ord [i]) == 0) {</div>
<div class="line"><a name="l01157"></a><span class="lineno"> 1157</span>&#160;                <span class="comment">// same as previous =&gt; remember</span></div>
<div class="line"><a name="l01158"></a><span class="lineno"> 1158</span>&#160;                <span class="keywordflow">if</span> (prev + 1 == i) { <span class="comment">// start new group</span></div>
<div class="line"><a name="l01159"></a><span class="lineno"> 1159</span>&#160;                    ngroup++;</div>
<div class="line"><a name="l01160"></a><span class="lineno"> 1160</span>&#160;                    lims[ngroup] = lims[ngroup - 1];</div>
<div class="line"><a name="l01161"></a><span class="lineno"> 1161</span>&#160;                    dup_ids [lims [ngroup]++] = list_ids [ord [prev]];</div>
<div class="line"><a name="l01162"></a><span class="lineno"> 1162</span>&#160;                }</div>
<div class="line"><a name="l01163"></a><span class="lineno"> 1163</span>&#160;                dup_ids [lims [ngroup]++] = list_ids [ord [i]];</div>
<div class="line"><a name="l01164"></a><span class="lineno"> 1164</span>&#160;            } <span class="keywordflow">else</span> { <span class="comment">// not same as previous.</span></div>
<div class="line"><a name="l01165"></a><span class="lineno"> 1165</span>&#160;                prev = i;</div>
<div class="line"><a name="l01166"></a><span class="lineno"> 1166</span>&#160;            }</div>
<div class="line"><a name="l01167"></a><span class="lineno"> 1167</span>&#160;        }</div>
<div class="line"><a name="l01168"></a><span class="lineno"> 1168</span>&#160;    }</div>
<div class="line"><a name="l01169"></a><span class="lineno"> 1169</span>&#160;    <span class="keywordflow">return</span> ngroup;</div>
<div class="line"><a name="l01170"></a><span class="lineno"> 1170</span>&#160;}</div>
<div class="line"><a name="l01171"></a><span class="lineno"> 1171</span>&#160;</div>
<div class="line"><a name="l01172"></a><span class="lineno"> 1172</span>&#160;</div>
<div class="line"><a name="l01173"></a><span class="lineno"> 1173</span>&#160;</div>
<div class="line"><a name="l01174"></a><span class="lineno"> 1174</span>&#160;</div>
<div class="line"><a name="l01175"></a><span class="lineno"> 1175</span>&#160;<span class="comment">/*****************************************</span></div>
<div class="line"><a name="l01176"></a><span class="lineno"> 1176</span>&#160;<span class="comment"> * IndexIVFPQR implementation</span></div>
<div class="line"><a name="l01177"></a><span class="lineno"> 1177</span>&#160;<span class="comment"> ******************************************/</span></div>
<div class="line"><a name="l01178"></a><span class="lineno"> 1178</span>&#160;</div>
<div class="line"><a name="l01179"></a><span class="lineno"> 1179</span>&#160;IndexIVFPQR::IndexIVFPQR (</div>
<div class="line"><a name="l01180"></a><span class="lineno"> 1180</span>&#160;            <a class="code" href="structfaiss_1_1Index.html">Index</a> * quantizer, <span class="keywordtype">size_t</span> d, <span class="keywordtype">size_t</span> nlist,</div>
<div class="line"><a name="l01181"></a><span class="lineno"> 1181</span>&#160;            <span class="keywordtype">size_t</span> M, <span class="keywordtype">size_t</span> nbits_per_idx,</div>
<div class="line"><a name="l01182"></a><span class="lineno"> 1182</span>&#160;            <span class="keywordtype">size_t</span> M_refine, <span class="keywordtype">size_t</span> nbits_per_idx_refine):</div>
<div class="line"><a name="l01183"></a><span class="lineno"> 1183</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html">IndexIVFPQ</a> (quantizer, d, nlist, M, nbits_per_idx),</div>
<div class="line"><a name="l01184"></a><span class="lineno"> 1184</span>&#160;    refine_pq (d, M_refine, nbits_per_idx_refine),</div>
<div class="line"><a name="l01185"></a><span class="lineno"> 1185</span>&#160;    k_factor (4)</div>
<div class="line"><a name="l01186"></a><span class="lineno"> 1186</span>&#160;{</div>
<div class="line"><a name="l01187"></a><span class="lineno"> 1187</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01188"></a><span class="lineno"> 1188</span>&#160;}</div>
<div class="line"><a name="l01189"></a><span class="lineno"> 1189</span>&#160;</div>
<div class="line"><a name="l01190"></a><span class="lineno"> 1190</span>&#160;IndexIVFPQR::IndexIVFPQR ():</div>
<div class="line"><a name="l01191"></a><span class="lineno"> 1191</span>&#160;    k_factor (1)</div>
<div class="line"><a name="l01192"></a><span class="lineno"> 1192</span>&#160;{</div>
<div class="line"><a name="l01193"></a><span class="lineno"> 1193</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01194"></a><span class="lineno"> 1194</span>&#160;}</div>
<div class="line"><a name="l01195"></a><span class="lineno"> 1195</span>&#160;</div>
<div class="line"><a name="l01196"></a><span class="lineno"> 1196</span>&#160;</div>
<div class="line"><a name="l01197"></a><span class="lineno"> 1197</span>&#160;</div>
<div class="line"><a name="l01198"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#ae0e979a014a9defe2254e9543657b075"> 1198</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#ae0e979a014a9defe2254e9543657b075">IndexIVFPQR::reset</a>()</div>
<div class="line"><a name="l01199"></a><span class="lineno"> 1199</span>&#160;{</div>
<div class="line"><a name="l01200"></a><span class="lineno"> 1200</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#a47a3b7665e9d2be41c6d3b2e9144b73f">IndexIVFPQ::reset</a>();</div>
<div class="line"><a name="l01201"></a><span class="lineno"> 1201</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>.clear();</div>
<div class="line"><a name="l01202"></a><span class="lineno"> 1202</span>&#160;}</div>
<div class="line"><a name="l01203"></a><span class="lineno"> 1203</span>&#160;</div>
<div class="line"><a name="l01204"></a><span class="lineno"> 1204</span>&#160;</div>
<div class="line"><a name="l01205"></a><span class="lineno"> 1205</span>&#160;</div>
<div class="line"><a name="l01206"></a><span class="lineno"> 1206</span>&#160;</div>
<div class="line"><a name="l01207"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#a68ed7cae5bec89fcdcb6a1d2addbd5a8"> 1207</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a68ed7cae5bec89fcdcb6a1d2addbd5a8">IndexIVFPQR::train_residual</a> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x)</div>
<div class="line"><a name="l01208"></a><span class="lineno"> 1208</span>&#160;{</div>
<div class="line"><a name="l01209"></a><span class="lineno"> 1209</span>&#160;</div>
<div class="line"><a name="l01210"></a><span class="lineno"> 1210</span>&#160;    <span class="keywordtype">float</span> * residual_2 = <span class="keyword">new</span> <span class="keywordtype">float</span> [n * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>];</div>
<div class="line"><a name="l01211"></a><span class="lineno"> 1211</span>&#160;    <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter &lt;float&gt;</a> del(residual_2);</div>
<div class="line"><a name="l01212"></a><span class="lineno"> 1212</span>&#160;</div>
<div class="line"><a name="l01213"></a><span class="lineno"> 1213</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a4e06f04853dcb424dc393de5f641e917">train_residual_o</a> (n, x, residual_2);</div>
<div class="line"><a name="l01214"></a><span class="lineno"> 1214</span>&#160;</div>
<div class="line"><a name="l01215"></a><span class="lineno"> 1215</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
<div class="line"><a name="l01216"></a><span class="lineno"> 1216</span>&#160;        printf (<span class="stringliteral">&quot;training %zdx%zd 2nd level PQ quantizer on %ld %dD-vectors\n&quot;</span>,</div>
<div class="line"><a name="l01217"></a><span class="lineno"> 1217</span>&#160;                <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a>, <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>, n, d);</div>
<div class="line"><a name="l01218"></a><span class="lineno"> 1218</span>&#160;</div>
<div class="line"><a name="l01219"></a><span class="lineno"> 1219</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#af265acf5aa1bcda60898002287e6a3d6">cp</a>.<a class="code" href="structfaiss_1_1ClusteringParameters.html#a993e0a035248faad6e292a5ef9af1953">max_points_per_centroid</a> = 1000;</div>
<div class="line"><a name="l01220"></a><span class="lineno"> 1220</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#af265acf5aa1bcda60898002287e6a3d6">cp</a>.verbose = <a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>;</div>
<div class="line"><a name="l01221"></a><span class="lineno"> 1221</span>&#160;</div>
<div class="line"><a name="l01222"></a><span class="lineno"> 1222</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.train (n, residual_2);</div>
<div class="line"><a name="l01223"></a><span class="lineno"> 1223</span>&#160;</div>
<div class="line"><a name="l01224"></a><span class="lineno"> 1224</span>&#160;}</div>
<div class="line"><a name="l01225"></a><span class="lineno"> 1225</span>&#160;</div>
<div class="line"><a name="l01226"></a><span class="lineno"> 1226</span>&#160;</div>
<div class="line"><a name="l01227"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#a4b6154a5194d574d037ba78c137a2fa5"> 1227</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4b6154a5194d574d037ba78c137a2fa5">IndexIVFPQR::add_with_ids</a> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <span class="keyword">const</span> <span class="keywordtype">long</span> *xids) {</div>
<div class="line"><a name="l01228"></a><span class="lineno"> 1228</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a186b746f22b65ddf416b1e821b0866ec">add_core</a> (n, x, xids, <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l01229"></a><span class="lineno"> 1229</span>&#160;}</div>
<div class="line"><a name="l01230"></a><span class="lineno"> 1230</span>&#160;</div>
<div class="line"><a name="l01231"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#a186b746f22b65ddf416b1e821b0866ec"> 1231</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a186b746f22b65ddf416b1e821b0866ec">IndexIVFPQR::add_core</a> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <span class="keyword">const</span> <span class="keywordtype">long</span> *xids,</div>
<div class="line"><a name="l01232"></a><span class="lineno"> 1232</span>&#160;                                <span class="keyword">const</span> <span class="keywordtype">long</span> *precomputed_idx) {</div>
<div class="line"><a name="l01233"></a><span class="lineno"> 1233</span>&#160;</div>
<div class="line"><a name="l01234"></a><span class="lineno"> 1234</span>&#160;    <span class="keywordtype">float</span> * residual_2 = <span class="keyword">new</span> <span class="keywordtype">float</span> [n * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>];</div>
<div class="line"><a name="l01235"></a><span class="lineno"> 1235</span>&#160;    <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter &lt;float&gt;</a> del(residual_2);</div>
<div class="line"><a name="l01236"></a><span class="lineno"> 1236</span>&#160;</div>
<div class="line"><a name="l01237"></a><span class="lineno"> 1237</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n0 = <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>;</div>
<div class="line"><a name="l01238"></a><span class="lineno"> 1238</span>&#160;</div>
<div class="line"><a name="l01239"></a><span class="lineno"> 1239</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#ac0cb8421b9885d691696d2ff4f76894b">add_core_o</a> (n, x, xids, residual_2, precomputed_idx);</div>
<div class="line"><a name="l01240"></a><span class="lineno"> 1240</span>&#160;</div>
<div class="line"><a name="l01241"></a><span class="lineno"> 1241</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>.resize (<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> * <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a>);</div>
<div class="line"><a name="l01242"></a><span class="lineno"> 1242</span>&#160;</div>
<div class="line"><a name="l01243"></a><span class="lineno"> 1243</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#ae5a340ee5a4b1d35a565b167de2a2ef1">compute_codes</a> (</div>
<div class="line"><a name="l01244"></a><span class="lineno"> 1244</span>&#160;        residual_2, &amp;<a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>[n0 * <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a>], n);</div>
<div class="line"><a name="l01245"></a><span class="lineno"> 1245</span>&#160;</div>
<div class="line"><a name="l01246"></a><span class="lineno"> 1246</span>&#160;</div>
<div class="line"><a name="l01247"></a><span class="lineno"> 1247</span>&#160;}</div>
<div class="line"><a name="l01248"></a><span class="lineno"> 1248</span>&#160;</div>
<div class="line"><a name="l01249"></a><span class="lineno"> 1249</span>&#160;</div>
<div class="line"><a name="l01250"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#ab9daed04d3cb3f7f57f32c6b477ac5b3"> 1250</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#ab9daed04d3cb3f7f57f32c6b477ac5b3">IndexIVFPQR::search_preassigned</a> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> k,</div>
<div class="line"><a name="l01251"></a><span class="lineno"> 1251</span>&#160;                                      <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *idx,</div>
<div class="line"><a name="l01252"></a><span class="lineno"> 1252</span>&#160;                                      <span class="keyword">const</span> <span class="keywordtype">float</span> *L1_dis,</div>
<div class="line"><a name="l01253"></a><span class="lineno"> 1253</span>&#160;                                      <span class="keywordtype">float</span> *distances, <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *labels,</div>
<div class="line"><a name="l01254"></a><span class="lineno"> 1254</span>&#160;                                      <span class="keywordtype">bool</span> store_pairs,</div>
<div class="line"><a name="l01255"></a><span class="lineno"> 1255</span>&#160;                                      <span class="keyword">const</span> <a class="code" href="structfaiss_1_1IVFSearchParameters.html">IVFSearchParameters</a> *params</div>
<div class="line"><a name="l01256"></a><span class="lineno"> 1256</span>&#160;                                      )<span class="keyword"> const</span></div>
<div class="line"><a name="l01257"></a><span class="lineno"> 1257</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l01258"></a><span class="lineno"> 1258</span>&#160;    uint64_t t0;</div>
<div class="line"><a name="l01259"></a><span class="lineno"> 1259</span>&#160;    TIC;</div>
<div class="line"><a name="l01260"></a><span class="lineno"> 1260</span>&#160;    <span class="keywordtype">size_t</span> k_coarse = long(k * <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a0b02a4151ceacc070352f8b15cc0ee0b">k_factor</a>);</div>
<div class="line"><a name="l01261"></a><span class="lineno"> 1261</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *coarse_labels = <span class="keyword">new</span> <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> [k_coarse * n];</div>
<div class="line"><a name="l01262"></a><span class="lineno"> 1262</span>&#160;    <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;idx_t&gt;</a> del1 (coarse_labels);</div>
<div class="line"><a name="l01263"></a><span class="lineno"> 1263</span>&#160;    { <span class="comment">// query with quantizer levels 1 and 2.</span></div>
<div class="line"><a name="l01264"></a><span class="lineno"> 1264</span>&#160;        <span class="keywordtype">float</span> *coarse_distances = <span class="keyword">new</span> <span class="keywordtype">float</span> [k_coarse * n];</div>
<div class="line"><a name="l01265"></a><span class="lineno"> 1265</span>&#160;        <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;float&gt;</a> del(coarse_distances);</div>
<div class="line"><a name="l01266"></a><span class="lineno"> 1266</span>&#160;</div>
<div class="line"><a name="l01267"></a><span class="lineno"> 1267</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVF.html#a7cf3a1963394f87d61913420a66eb468">IndexIVFPQ::search_preassigned</a> (</div>
<div class="line"><a name="l01268"></a><span class="lineno"> 1268</span>&#160;                   n, x, k_coarse,</div>
<div class="line"><a name="l01269"></a><span class="lineno"> 1269</span>&#160;                   idx, L1_dis, coarse_distances, coarse_labels,</div>
<div class="line"><a name="l01270"></a><span class="lineno"> 1270</span>&#160;                   <span class="keyword">true</span>, params);</div>
<div class="line"><a name="l01271"></a><span class="lineno"> 1271</span>&#160;    }</div>
<div class="line"><a name="l01272"></a><span class="lineno"> 1272</span>&#160;</div>
<div class="line"><a name="l01273"></a><span class="lineno"> 1273</span>&#160;</div>
<div class="line"><a name="l01274"></a><span class="lineno"> 1274</span>&#160;    indexIVFPQ_stats.search_cycles += TOC;</div>
<div class="line"><a name="l01275"></a><span class="lineno"> 1275</span>&#160;</div>
<div class="line"><a name="l01276"></a><span class="lineno"> 1276</span>&#160;    TIC;</div>
<div class="line"><a name="l01277"></a><span class="lineno"> 1277</span>&#160;</div>
<div class="line"><a name="l01278"></a><span class="lineno"> 1278</span>&#160;    <span class="comment">// 3rd level refinement</span></div>
<div class="line"><a name="l01279"></a><span class="lineno"> 1279</span>&#160;    <span class="keywordtype">size_t</span> n_refine = 0;</div>
<div class="line"><a name="l01280"></a><span class="lineno"> 1280</span>&#160;<span class="preprocessor">#pragma omp parallel reduction(+ : n_refine)</span></div>
<div class="line"><a name="l01281"></a><span class="lineno"> 1281</span>&#160;<span class="preprocessor"></span>    {</div>
<div class="line"><a name="l01282"></a><span class="lineno"> 1282</span>&#160;        <span class="comment">// tmp buffers</span></div>
<div class="line"><a name="l01283"></a><span class="lineno"> 1283</span>&#160;        <span class="keywordtype">float</span> *residual_1 = <span class="keyword">new</span> <span class="keywordtype">float</span> [2 * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>];</div>
<div class="line"><a name="l01284"></a><span class="lineno"> 1284</span>&#160;        <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;float&gt;</a> del (residual_1);</div>
<div class="line"><a name="l01285"></a><span class="lineno"> 1285</span>&#160;        <span class="keywordtype">float</span> *residual_2 = residual_1 + <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l01286"></a><span class="lineno"> 1286</span>&#160;<span class="preprocessor">#pragma omp for</span></div>
<div class="line"><a name="l01287"></a><span class="lineno"> 1287</span>&#160;<span class="preprocessor"></span>        <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i = 0; i &lt; n; i++) {</div>
<div class="line"><a name="l01288"></a><span class="lineno"> 1288</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">float</span> *xq = x + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l01289"></a><span class="lineno"> 1289</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">long</span> * shortlist = coarse_labels + k_coarse * i;</div>
<div class="line"><a name="l01290"></a><span class="lineno"> 1290</span>&#160;            <span class="keywordtype">float</span> * heap_sim = distances + k * i;</div>
<div class="line"><a name="l01291"></a><span class="lineno"> 1291</span>&#160;            <span class="keywordtype">long</span> * heap_ids = labels + k * i;</div>
<div class="line"><a name="l01292"></a><span class="lineno"> 1292</span>&#160;            maxheap_heapify (k, heap_sim, heap_ids);</div>
<div class="line"><a name="l01293"></a><span class="lineno"> 1293</span>&#160;</div>
<div class="line"><a name="l01294"></a><span class="lineno"> 1294</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j &lt; k_coarse; j++) {</div>
<div class="line"><a name="l01295"></a><span class="lineno"> 1295</span>&#160;                <span class="keywordtype">long</span> sl = shortlist[j];</div>
<div class="line"><a name="l01296"></a><span class="lineno"> 1296</span>&#160;</div>
<div class="line"><a name="l01297"></a><span class="lineno"> 1297</span>&#160;                <span class="keywordflow">if</span> (sl == -1) <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l01298"></a><span class="lineno"> 1298</span>&#160;</div>
<div class="line"><a name="l01299"></a><span class="lineno"> 1299</span>&#160;                <span class="keywordtype">int</span> list_no = sl &gt;&gt; 32;</div>
<div class="line"><a name="l01300"></a><span class="lineno"> 1300</span>&#160;                <span class="keywordtype">int</span> ofs = sl &amp; 0xffffffff;</div>
<div class="line"><a name="l01301"></a><span class="lineno"> 1301</span>&#160;</div>
<div class="line"><a name="l01302"></a><span class="lineno"> 1302</span>&#160;                assert (list_no &gt;= 0 &amp;&amp; list_no &lt; <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>);</div>
<div class="line"><a name="l01303"></a><span class="lineno"> 1303</span>&#160;                assert (ofs &gt;= 0 &amp;&amp; ofs &lt; invlists-&gt;list_size (list_no));</div>
<div class="line"><a name="l01304"></a><span class="lineno"> 1304</span>&#160;</div>
<div class="line"><a name="l01305"></a><span class="lineno"> 1305</span>&#160;                <span class="comment">// 1st level residual</span></div>
<div class="line"><a name="l01306"></a><span class="lineno"> 1306</span>&#160;                quantizer-&gt;<a class="code" href="structfaiss_1_1Index.html#aaae77608bbda70b1098897e9167a82f9">compute_residual</a> (xq, residual_1, list_no);</div>
<div class="line"><a name="l01307"></a><span class="lineno"> 1307</span>&#160;</div>
<div class="line"><a name="l01308"></a><span class="lineno"> 1308</span>&#160;                <span class="comment">// 2nd level residual</span></div>
<div class="line"><a name="l01309"></a><span class="lineno"> 1309</span>&#160;                <span class="keyword">const</span> uint8_t * l2code =</div>
<div class="line"><a name="l01310"></a><span class="lineno"> 1310</span>&#160;                    <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#afc2760bed7c210f2fad9b03109f561ee">get_single_code</a> (list_no, ofs);</div>
<div class="line"><a name="l01311"></a><span class="lineno"> 1311</span>&#160;</div>
<div class="line"><a name="l01312"></a><span class="lineno"> 1312</span>&#160;                <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (l2code, residual_2);</div>
<div class="line"><a name="l01313"></a><span class="lineno"> 1313</span>&#160;                <span class="keywordflow">for</span> (<span class="keywordtype">int</span> l = 0; l &lt; <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>; l++)</div>
<div class="line"><a name="l01314"></a><span class="lineno"> 1314</span>&#160;                    residual_2[l] = residual_1[l] - residual_2[l];</div>
<div class="line"><a name="l01315"></a><span class="lineno"> 1315</span>&#160;</div>
<div class="line"><a name="l01316"></a><span class="lineno"> 1316</span>&#160;                <span class="comment">// 3rd level residual&#39;s approximation</span></div>
<div class="line"><a name="l01317"></a><span class="lineno"> 1317</span>&#160;                <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> <span class="keywordtype">id</span> = <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a21b52cdb0601cd225bd7924932310876">get_single_id</a> (list_no, ofs);</div>
<div class="line"><a name="l01318"></a><span class="lineno"> 1318</span>&#160;                assert (0 &lt;= <span class="keywordtype">id</span> &amp;&amp; <span class="keywordtype">id</span> &lt; <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>);</div>
<div class="line"><a name="l01319"></a><span class="lineno"> 1319</span>&#160;                <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (&amp;<a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a> [<span class="keywordtype">id</span> * <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a>],</div>
<div class="line"><a name="l01320"></a><span class="lineno"> 1320</span>&#160;                                  residual_1);</div>
<div class="line"><a name="l01321"></a><span class="lineno"> 1321</span>&#160;</div>
<div class="line"><a name="l01322"></a><span class="lineno"> 1322</span>&#160;                <span class="keywordtype">float</span> dis = <a class="code" href="namespacefaiss.html#a7466bd32de31640860393a701eaac5ad">fvec_L2sqr</a> (residual_1, residual_2, d);</div>
<div class="line"><a name="l01323"></a><span class="lineno"> 1323</span>&#160;</div>
<div class="line"><a name="l01324"></a><span class="lineno"> 1324</span>&#160;                <span class="keywordflow">if</span> (dis &lt; heap_sim[0]) {</div>
<div class="line"><a name="l01325"></a><span class="lineno"> 1325</span>&#160;                    maxheap_pop (k, heap_sim, heap_ids);</div>
<div class="line"><a name="l01326"></a><span class="lineno"> 1326</span>&#160;                    <span class="keywordtype">long</span> id_or_pair = store_pairs ? sl : id;</div>
<div class="line"><a name="l01327"></a><span class="lineno"> 1327</span>&#160;                    maxheap_push (k, heap_sim, heap_ids, dis, id_or_pair);</div>
<div class="line"><a name="l01328"></a><span class="lineno"> 1328</span>&#160;                }</div>
<div class="line"><a name="l01329"></a><span class="lineno"> 1329</span>&#160;                n_refine ++;</div>
<div class="line"><a name="l01330"></a><span class="lineno"> 1330</span>&#160;            }</div>
<div class="line"><a name="l01331"></a><span class="lineno"> 1331</span>&#160;            maxheap_reorder (k, heap_sim, heap_ids);</div>
<div class="line"><a name="l01332"></a><span class="lineno"> 1332</span>&#160;        }</div>
<div class="line"><a name="l01333"></a><span class="lineno"> 1333</span>&#160;    }</div>
<div class="line"><a name="l01334"></a><span class="lineno"> 1334</span>&#160;    indexIVFPQ_stats.nrefine += n_refine;</div>
<div class="line"><a name="l01335"></a><span class="lineno"> 1335</span>&#160;    indexIVFPQ_stats.refine_cycles += TOC;</div>
<div class="line"><a name="l01336"></a><span class="lineno"> 1336</span>&#160;}</div>
<div class="line"><a name="l01337"></a><span class="lineno"> 1337</span>&#160;</div>
<div class="line"><a name="l01338"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#a83aa33ae77eb80f6564992e250abcf41"> 1338</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a83aa33ae77eb80f6564992e250abcf41">IndexIVFPQR::reconstruct_from_offset</a> (<span class="keywordtype">long</span> list_no, <span class="keywordtype">long</span> offset,</div>
<div class="line"><a name="l01339"></a><span class="lineno"> 1339</span>&#160;                                           <span class="keywordtype">float</span>* recons)<span class="keyword"> const</span></div>
<div class="line"><a name="l01340"></a><span class="lineno"> 1340</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l01341"></a><span class="lineno"> 1341</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a921c6640d3a16bb3608883d8e8948810">IndexIVFPQ::reconstruct_from_offset</a> (list_no, offset, recons);</div>
<div class="line"><a name="l01342"></a><span class="lineno"> 1342</span>&#160;</div>
<div class="line"><a name="l01343"></a><span class="lineno"> 1343</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> <span class="keywordtype">id</span> = <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a21b52cdb0601cd225bd7924932310876">get_single_id</a> (list_no, offset);</div>
<div class="line"><a name="l01344"></a><span class="lineno"> 1344</span>&#160;    assert (0 &lt;= <span class="keywordtype">id</span> &amp;&amp; <span class="keywordtype">id</span> &lt; <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>);</div>
<div class="line"><a name="l01345"></a><span class="lineno"> 1345</span>&#160;</div>
<div class="line"><a name="l01346"></a><span class="lineno"> 1346</span>&#160;    std::vector&lt;float&gt; r3(d);</div>
<div class="line"><a name="l01347"></a><span class="lineno"> 1347</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (&amp;<a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a> [<span class="keywordtype">id</span> * <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">refine_pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a>], r3.data());</div>
<div class="line"><a name="l01348"></a><span class="lineno"> 1348</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>; ++i) {</div>
<div class="line"><a name="l01349"></a><span class="lineno"> 1349</span>&#160;      recons[i] += r3[i];</div>
<div class="line"><a name="l01350"></a><span class="lineno"> 1350</span>&#160;    }</div>
<div class="line"><a name="l01351"></a><span class="lineno"> 1351</span>&#160;}</div>
<div class="line"><a name="l01352"></a><span class="lineno"> 1352</span>&#160;</div>
<div class="line"><a name="l01353"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#a31a1fec2a88b410ea96ce5be7d527be9"> 1353</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a31a1fec2a88b410ea96ce5be7d527be9">IndexIVFPQR::merge_from</a> (<a class="code" href="structfaiss_1_1IndexIVF.html">IndexIVF</a> &amp;other_in, <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> add_id)</div>
<div class="line"><a name="l01354"></a><span class="lineno"> 1354</span>&#160;{</div>
<div class="line"><a name="l01355"></a><span class="lineno"> 1355</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQR.html">IndexIVFPQR</a> *other = <span class="keyword">dynamic_cast&lt;</span><a class="code" href="structfaiss_1_1IndexIVFPQR.html">IndexIVFPQR</a> *<span class="keyword">&gt;</span> (&amp;other_in);</div>
<div class="line"><a name="l01356"></a><span class="lineno"> 1356</span>&#160;    FAISS_THROW_IF_NOT(other);</div>
<div class="line"><a name="l01357"></a><span class="lineno"> 1357</span>&#160;</div>
<div class="line"><a name="l01358"></a><span class="lineno"> 1358</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#a0f22cc237c30c935df5b6560aecf8f01">IndexIVF::merge_from</a> (other_in, add_id);</div>
<div class="line"><a name="l01359"></a><span class="lineno"> 1359</span>&#160;</div>
<div class="line"><a name="l01360"></a><span class="lineno"> 1360</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>.insert (<a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>.end(),</div>
<div class="line"><a name="l01361"></a><span class="lineno"> 1361</span>&#160;                         other-&gt;<a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>.begin(),</div>
<div class="line"><a name="l01362"></a><span class="lineno"> 1362</span>&#160;                         other-&gt;<a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>.end());</div>
<div class="line"><a name="l01363"></a><span class="lineno"> 1363</span>&#160;    other-&gt;<a class="code" href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">refine_codes</a>.clear();</div>
<div class="line"><a name="l01364"></a><span class="lineno"> 1364</span>&#160;}</div>
<div class="line"><a name="l01365"></a><span class="lineno"> 1365</span>&#160;</div>
<div class="line"><a name="l01366"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFPQR.html#acc5eeeeb8ac8d2581ef07947932d9f6c"> 1366</a></span>&#160;<span class="keywordtype">long</span> <a class="code" href="structfaiss_1_1IndexIVFPQR.html#acc5eeeeb8ac8d2581ef07947932d9f6c">IndexIVFPQR::remove_ids</a>(<span class="keyword">const</span> <a class="code" href="structfaiss_1_1IDSelector.html">IDSelector</a>&amp; <span class="comment">/*sel*/</span>) {</div>
<div class="line"><a name="l01367"></a><span class="lineno"> 1367</span>&#160;  FAISS_THROW_MSG(<span class="stringliteral">&quot;not implemented&quot;</span>);</div>
<div class="line"><a name="l01368"></a><span class="lineno"> 1368</span>&#160;  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l01369"></a><span class="lineno"> 1369</span>&#160;}</div>
<div class="line"><a name="l01370"></a><span class="lineno"> 1370</span>&#160;</div>
<div class="line"><a name="l01371"></a><span class="lineno"> 1371</span>&#160;<span class="comment">/*************************************</span></div>
<div class="line"><a name="l01372"></a><span class="lineno"> 1372</span>&#160;<span class="comment"> * Index2Layer implementation</span></div>
<div class="line"><a name="l01373"></a><span class="lineno"> 1373</span>&#160;<span class="comment"> *************************************/</span></div>
<div class="line"><a name="l01374"></a><span class="lineno"> 1374</span>&#160;</div>
<div class="line"><a name="l01375"></a><span class="lineno"> 1375</span>&#160;</div>
<div class="line"><a name="l01376"></a><span class="lineno"> 1376</span>&#160;Index2Layer::Index2Layer (<a class="code" href="structfaiss_1_1Index.html">Index</a> * quantizer, <span class="keywordtype">size_t</span> nlist,</div>
<div class="line"><a name="l01377"></a><span class="lineno"> 1377</span>&#160;                          <span class="keywordtype">int</span> M,</div>
<div class="line"><a name="l01378"></a><span class="lineno"> 1378</span>&#160;                          <a class="code" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">MetricType</a> metric):</div>
<div class="line"><a name="l01379"></a><span class="lineno"> 1379</span>&#160;    <a class="code" href="structfaiss_1_1Index.html">Index</a> (quantizer-&gt;d, metric),</div>
<div class="line"><a name="l01380"></a><span class="lineno"> 1380</span>&#160;    q1 (quantizer, nlist),</div>
<div class="line"><a name="l01381"></a><span class="lineno"> 1381</span>&#160;    pq (quantizer-&gt;d, M, 8)</div>
<div class="line"><a name="l01382"></a><span class="lineno"> 1382</span>&#160;{</div>
<div class="line"><a name="l01383"></a><span class="lineno"> 1383</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> = <span class="keyword">false</span>;</div>
<div class="line"><a name="l01384"></a><span class="lineno"> 1384</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> nbyte = 0; nbyte &lt; 7; nbyte++) {</div>
<div class="line"><a name="l01385"></a><span class="lineno"> 1385</span>&#160;        <span class="keywordflow">if</span> ((1L &lt;&lt; (8 * nbyte)) &gt;= nlist) {</div>
<div class="line"><a name="l01386"></a><span class="lineno"> 1386</span>&#160;            code_size_1 = nbyte;</div>
<div class="line"><a name="l01387"></a><span class="lineno"> 1387</span>&#160;            <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l01388"></a><span class="lineno"> 1388</span>&#160;        }</div>
<div class="line"><a name="l01389"></a><span class="lineno"> 1389</span>&#160;    }</div>
<div class="line"><a name="l01390"></a><span class="lineno"> 1390</span>&#160;    code_size_2 = <a class="code" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">code_size</a>;</div>
<div class="line"><a name="l01391"></a><span class="lineno"> 1391</span>&#160;    code_size = code_size_1 + code_size_2;</div>
<div class="line"><a name="l01392"></a><span class="lineno"> 1392</span>&#160;}</div>
<div class="line"><a name="l01393"></a><span class="lineno"> 1393</span>&#160;</div>
<div class="line"><a name="l01394"></a><span class="lineno"> 1394</span>&#160;Index2Layer::Index2Layer ()</div>
<div class="line"><a name="l01395"></a><span class="lineno"> 1395</span>&#160;{</div>
<div class="line"><a name="l01396"></a><span class="lineno"> 1396</span>&#160;    code_size = <a class="code" href="structfaiss_1_1Index2Layer.html#a735b2b6cc50e4186776a8213d2679837">code_size_1</a> = <a class="code" href="structfaiss_1_1Index2Layer.html#ad47e3c6493d54c2b83f1120b480d20f3">code_size_2</a> = 0;</div>
<div class="line"><a name="l01397"></a><span class="lineno"> 1397</span>&#160;}</div>
<div class="line"><a name="l01398"></a><span class="lineno"> 1398</span>&#160;</div>
<div class="line"><a name="l01399"></a><span class="lineno"> 1399</span>&#160;Index2Layer::~Index2Layer ()</div>
<div class="line"><a name="l01400"></a><span class="lineno"> 1400</span>&#160;{}</div>
<div class="line"><a name="l01401"></a><span class="lineno"> 1401</span>&#160;</div>
<div class="line"><a name="l01402"></a><span class="lineno"><a class="line" href="structfaiss_1_1Index2Layer.html#a48cbf519590313f1c6a3dc89c8d0678c"> 1402</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1Index2Layer.html#a48cbf519590313f1c6a3dc89c8d0678c">Index2Layer::train</a>(<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span>* x)</div>
<div class="line"><a name="l01403"></a><span class="lineno"> 1403</span>&#160;{</div>
<div class="line"><a name="l01404"></a><span class="lineno"> 1404</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>) {</div>
<div class="line"><a name="l01405"></a><span class="lineno"> 1405</span>&#160;        printf (<span class="stringliteral">&quot;training level-1 quantizer %ld vectors in %dD\n&quot;</span>,</div>
<div class="line"><a name="l01406"></a><span class="lineno"> 1406</span>&#160;                n, d);</div>
<div class="line"><a name="l01407"></a><span class="lineno"> 1407</span>&#160;    }</div>
<div class="line"><a name="l01408"></a><span class="lineno"> 1408</span>&#160;</div>
<div class="line"><a name="l01409"></a><span class="lineno"> 1409</span>&#160;    <a class="code" href="structfaiss_1_1Index2Layer.html#a5f2d70740af90b8c7ac946d58ec947aa">q1</a>.<a class="code" href="structfaiss_1_1Level1Quantizer.html#a0069a6ee1e32c2e0c1c7df9a95740dd4">train_q1</a> (n, x, <a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>, <a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a>);</div>
<div class="line"><a name="l01410"></a><span class="lineno"> 1410</span>&#160;</div>
<div class="line"><a name="l01411"></a><span class="lineno"> 1411</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>) {</div>
<div class="line"><a name="l01412"></a><span class="lineno"> 1412</span>&#160;        printf(<span class="stringliteral">&quot;computing residuals\n&quot;</span>);</div>
<div class="line"><a name="l01413"></a><span class="lineno"> 1413</span>&#160;    }</div>
<div class="line"><a name="l01414"></a><span class="lineno"> 1414</span>&#160;</div>
<div class="line"><a name="l01415"></a><span class="lineno"> 1415</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> * x_in = x;</div>
<div class="line"><a name="l01416"></a><span class="lineno"> 1416</span>&#160;</div>
<div class="line"><a name="l01417"></a><span class="lineno"> 1417</span>&#160;    x = <a class="code" href="namespacefaiss.html#a14884d253128c7af5891a65082ad7dc6">fvecs_maybe_subsample</a> (</div>
<div class="line"><a name="l01418"></a><span class="lineno"> 1418</span>&#160;         d, (<span class="keywordtype">size_t</span>*)&amp;n, <a class="code" href="structfaiss_1_1Index2Layer.html#ab90d1de73cbc705a347cfc852ded6006">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#af265acf5aa1bcda60898002287e6a3d6">cp</a>.<a class="code" href="structfaiss_1_1ClusteringParameters.html#a993e0a035248faad6e292a5ef9af1953">max_points_per_centroid</a> * <a class="code" href="structfaiss_1_1Index2Layer.html#ab90d1de73cbc705a347cfc852ded6006">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>,</div>
<div class="line"><a name="l01419"></a><span class="lineno"> 1419</span>&#160;         x, <a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>, <a class="code" href="structfaiss_1_1Index2Layer.html#ab90d1de73cbc705a347cfc852ded6006">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#af265acf5aa1bcda60898002287e6a3d6">cp</a>.<a class="code" href="structfaiss_1_1ClusteringParameters.html#a509c65e2ebe6ecabebd163ecb03c5579">seed</a>);</div>
<div class="line"><a name="l01420"></a><span class="lineno"> 1420</span>&#160;</div>
<div class="line"><a name="l01421"></a><span class="lineno"> 1421</span>&#160;    <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;float&gt;</a> del_x (x_in == x ? <span class="keyword">nullptr</span> : x);</div>
<div class="line"><a name="l01422"></a><span class="lineno"> 1422</span>&#160;</div>
<div class="line"><a name="l01423"></a><span class="lineno"> 1423</span>&#160;    std::vector&lt;idx_t&gt; <a class="code" href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">assign</a>(n); <span class="comment">// assignement to coarse centroids</span></div>
<div class="line"><a name="l01424"></a><span class="lineno"> 1424</span>&#160;    <a class="code" href="structfaiss_1_1Index2Layer.html#a5f2d70740af90b8c7ac946d58ec947aa">q1</a>.<a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">assign</a> (n, x, assign.data());</div>
<div class="line"><a name="l01425"></a><span class="lineno"> 1425</span>&#160;    std::vector&lt;float&gt; residuals(n * d);</div>
<div class="line"><a name="l01426"></a><span class="lineno"> 1426</span>&#160;    <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i = 0; i &lt; n; i++) {</div>
<div class="line"><a name="l01427"></a><span class="lineno"> 1427</span>&#160;        <a class="code" href="structfaiss_1_1Index2Layer.html#a5f2d70740af90b8c7ac946d58ec947aa">q1</a>.<a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#aaae77608bbda70b1098897e9167a82f9">compute_residual</a> (</div>
<div class="line"><a name="l01428"></a><span class="lineno"> 1428</span>&#160;           x + i * d, residuals.data() + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, assign[i]);</div>
<div class="line"><a name="l01429"></a><span class="lineno"> 1429</span>&#160;    }</div>
<div class="line"><a name="l01430"></a><span class="lineno"> 1430</span>&#160;</div>
<div class="line"><a name="l01431"></a><span class="lineno"> 1431</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
<div class="line"><a name="l01432"></a><span class="lineno"> 1432</span>&#160;        printf (<span class="stringliteral">&quot;training %zdx%zd product quantizer on %ld vectors in %dD\n&quot;</span>,</div>
<div class="line"><a name="l01433"></a><span class="lineno"> 1433</span>&#160;                <a class="code" href="structfaiss_1_1Index2Layer.html#ab90d1de73cbc705a347cfc852ded6006">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">M</a>, <a class="code" href="structfaiss_1_1Index2Layer.html#ab90d1de73cbc705a347cfc852ded6006">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">ksub</a>, n, d);</div>
<div class="line"><a name="l01434"></a><span class="lineno"> 1434</span>&#160;    <a class="code" href="structfaiss_1_1Index2Layer.html#ab90d1de73cbc705a347cfc852ded6006">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a1e4056fa3938ed8c9fe701e90d94ad95">verbose</a> = <a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>;</div>
<div class="line"><a name="l01435"></a><span class="lineno"> 1435</span>&#160;    <a class="code" href="structfaiss_1_1Index2Layer.html#ab90d1de73cbc705a347cfc852ded6006">pq</a>.train (n, residuals.data());</div>
<div class="line"><a name="l01436"></a><span class="lineno"> 1436</span>&#160;</div>
<div class="line"><a name="l01437"></a><span class="lineno"> 1437</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01438"></a><span class="lineno"> 1438</span>&#160;}</div>
<div class="line"><a name="l01439"></a><span class="lineno"> 1439</span>&#160;</div>
<div class="line"><a name="l01440"></a><span class="lineno"><a class="line" href="structfaiss_1_1Index2Layer.html#a0aa69e64a2b216a01f99366e8ca4dc7b"> 1440</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1Index2Layer.html#a0aa69e64a2b216a01f99366e8ca4dc7b">Index2Layer::add</a>(<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span>* x)</div>
<div class="line"><a name="l01441"></a><span class="lineno"> 1441</span>&#160;{</div>
<div class="line"><a name="l01442"></a><span class="lineno"> 1442</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> bs = 32768;</div>
<div class="line"><a name="l01443"></a><span class="lineno"> 1443</span>&#160;    <span class="keywordflow">if</span> (n &gt; bs) {</div>
<div class="line"><a name="l01444"></a><span class="lineno"> 1444</span>&#160;        <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i0 = 0; i0 &lt; n; i0 += bs) {</div>
<div class="line"><a name="l01445"></a><span class="lineno"> 1445</span>&#160;            <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i1 = std::min(i0 + bs, n);</div>
<div class="line"><a name="l01446"></a><span class="lineno"> 1446</span>&#160;            <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>) {</div>
<div class="line"><a name="l01447"></a><span class="lineno"> 1447</span>&#160;                printf(<span class="stringliteral">&quot;Index2Layer::add: adding %ld:%ld / %ld\n&quot;</span>,</div>
<div class="line"><a name="l01448"></a><span class="lineno"> 1448</span>&#160;                       i0, i1, n);</div>
<div class="line"><a name="l01449"></a><span class="lineno"> 1449</span>&#160;            }</div>
<div class="line"><a name="l01450"></a><span class="lineno"> 1450</span>&#160;            <a class="code" href="structfaiss_1_1Index2Layer.html#a0aa69e64a2b216a01f99366e8ca4dc7b">add</a> (i1 - i0, x + i0 * d);</div>
<div class="line"><a name="l01451"></a><span class="lineno"> 1451</span>&#160;        }</div>
<div class="line"><a name="l01452"></a><span class="lineno"> 1452</span>&#160;        <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l01453"></a><span class="lineno"> 1453</span>&#160;    }</div>
<div class="line"><a name="l01454"></a><span class="lineno"> 1454</span>&#160;</div>
<div class="line"><a name="l01455"></a><span class="lineno"> 1455</span>&#160;    std::vector&lt;idx_t&gt; codes1 (n);</div>
<div class="line"><a name="l01456"></a><span class="lineno"> 1456</span>&#160;    <a class="code" href="structfaiss_1_1Index2Layer.html#a5f2d70740af90b8c7ac946d58ec947aa">q1</a>.<a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">assign</a> (n, x, codes1.data());</div>
<div class="line"><a name="l01457"></a><span class="lineno"> 1457</span>&#160;    std::vector&lt;float&gt; residuals(n * d);</div>
<div class="line"><a name="l01458"></a><span class="lineno"> 1458</span>&#160;    <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i = 0; i &lt; n; i++) {</div>
<div class="line"><a name="l01459"></a><span class="lineno"> 1459</span>&#160;        <a class="code" href="structfaiss_1_1Index2Layer.html#a5f2d70740af90b8c7ac946d58ec947aa">q1</a>.<a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#aaae77608bbda70b1098897e9167a82f9">compute_residual</a> (</div>
<div class="line"><a name="l01460"></a><span class="lineno"> 1460</span>&#160;            x + i * d, residuals.data() + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, codes1[i]);</div>
<div class="line"><a name="l01461"></a><span class="lineno"> 1461</span>&#160;    }</div>
<div class="line"><a name="l01462"></a><span class="lineno"> 1462</span>&#160;    std::vector&lt;uint8_t&gt; codes2 (n * <a class="code" href="structfaiss_1_1Index2Layer.html#ad47e3c6493d54c2b83f1120b480d20f3">code_size_2</a>);</div>
<div class="line"><a name="l01463"></a><span class="lineno"> 1463</span>&#160;</div>
<div class="line"><a name="l01464"></a><span class="lineno"> 1464</span>&#160;    <a class="code" href="structfaiss_1_1Index2Layer.html#ab90d1de73cbc705a347cfc852ded6006">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#ae5a340ee5a4b1d35a565b167de2a2ef1">compute_codes</a> (residuals.data(), codes2.data(), n);</div>
<div class="line"><a name="l01465"></a><span class="lineno"> 1465</span>&#160;</div>
<div class="line"><a name="l01466"></a><span class="lineno"> 1466</span>&#160;    codes.resize ((<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> + n) * code_size);</div>
<div class="line"><a name="l01467"></a><span class="lineno"> 1467</span>&#160;    uint8_t *wp = &amp;codes[<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> * <a class="code" href="structfaiss_1_1Index2Layer.html#a66403863c8ec987ed83b4d7ef4064fe9">code_size</a>];</div>
<div class="line"><a name="l01468"></a><span class="lineno"> 1468</span>&#160;</div>
<div class="line"><a name="l01469"></a><span class="lineno"> 1469</span>&#160;    {</div>
<div class="line"><a name="l01470"></a><span class="lineno"> 1470</span>&#160;        <span class="keywordtype">int</span> i = 0x11223344;</div>
<div class="line"><a name="l01471"></a><span class="lineno"> 1471</span>&#160;        <span class="keyword">const</span> <span class="keywordtype">char</span> *ip = (<span class="keywordtype">char</span>*)&amp;i;</div>
<div class="line"><a name="l01472"></a><span class="lineno"> 1472</span>&#160;        FAISS_THROW_IF_NOT_MSG (ip[0] == 0x44,</div>
<div class="line"><a name="l01473"></a><span class="lineno"> 1473</span>&#160;                                <span class="stringliteral">&quot;works only on a little-endian CPU&quot;</span>);</div>
<div class="line"><a name="l01474"></a><span class="lineno"> 1474</span>&#160;    }</div>
<div class="line"><a name="l01475"></a><span class="lineno"> 1475</span>&#160;</div>
<div class="line"><a name="l01476"></a><span class="lineno"> 1476</span>&#160;    <span class="comment">// copy to output table</span></div>
<div class="line"><a name="l01477"></a><span class="lineno"> 1477</span>&#160;    <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i = 0; i &lt; n; i++) {</div>
<div class="line"><a name="l01478"></a><span class="lineno"> 1478</span>&#160;        memcpy (wp, &amp;codes1[i], <a class="code" href="structfaiss_1_1Index2Layer.html#a735b2b6cc50e4186776a8213d2679837">code_size_1</a>);</div>
<div class="line"><a name="l01479"></a><span class="lineno"> 1479</span>&#160;        wp += <a class="code" href="structfaiss_1_1Index2Layer.html#a735b2b6cc50e4186776a8213d2679837">code_size_1</a>;</div>
<div class="line"><a name="l01480"></a><span class="lineno"> 1480</span>&#160;        memcpy (wp, &amp;codes2[i * code_size_2], code_size_2);</div>
<div class="line"><a name="l01481"></a><span class="lineno"> 1481</span>&#160;        wp += <a class="code" href="structfaiss_1_1Index2Layer.html#ad47e3c6493d54c2b83f1120b480d20f3">code_size_2</a>;</div>
<div class="line"><a name="l01482"></a><span class="lineno"> 1482</span>&#160;    }</div>
<div class="line"><a name="l01483"></a><span class="lineno"> 1483</span>&#160;</div>
<div class="line"><a name="l01484"></a><span class="lineno"> 1484</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> += n;</div>
<div class="line"><a name="l01485"></a><span class="lineno"> 1485</span>&#160;</div>
<div class="line"><a name="l01486"></a><span class="lineno"> 1486</span>&#160;}</div>
<div class="line"><a name="l01487"></a><span class="lineno"> 1487</span>&#160;</div>
<div class="line"><a name="l01488"></a><span class="lineno"><a class="line" href="structfaiss_1_1Index2Layer.html#a5961efc2e19d9a6e5224f477b6d1b226"> 1488</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1Index2Layer.html#a5961efc2e19d9a6e5224f477b6d1b226">Index2Layer::search</a>(</div>
<div class="line"><a name="l01489"></a><span class="lineno"> 1489</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> <span class="comment">/*n*/</span>,</div>
<div class="line"><a name="l01490"></a><span class="lineno"> 1490</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span>* <span class="comment">/*x*/</span>,</div>
<div class="line"><a name="l01491"></a><span class="lineno"> 1491</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> <span class="comment">/*k*/</span>,</div>
<div class="line"><a name="l01492"></a><span class="lineno"> 1492</span>&#160;    <span class="keywordtype">float</span>* <span class="comment">/*distances*/</span>,</div>
<div class="line"><a name="l01493"></a><span class="lineno"> 1493</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a>* <span class="comment">/*labels*/</span>)<span class="keyword"> const </span>{</div>
<div class="line"><a name="l01494"></a><span class="lineno"> 1494</span>&#160;  FAISS_THROW_MSG(<span class="stringliteral">&quot;not implemented&quot;</span>);</div>
<div class="line"><a name="l01495"></a><span class="lineno"> 1495</span>&#160;}</div>
<div class="line"><a name="l01496"></a><span class="lineno"> 1496</span>&#160;</div>
<div class="line"><a name="l01497"></a><span class="lineno"> 1497</span>&#160;</div>
<div class="line"><a name="l01498"></a><span class="lineno"><a class="line" href="structfaiss_1_1Index2Layer.html#a226daedaa05c0e0bb3a0afb78d5aa120"> 1498</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1Index2Layer.html#a226daedaa05c0e0bb3a0afb78d5aa120">Index2Layer::reconstruct_n</a>(<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i0, <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> ni, <span class="keywordtype">float</span>* recons)<span class="keyword"> const</span></div>
<div class="line"><a name="l01499"></a><span class="lineno"> 1499</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l01500"></a><span class="lineno"> 1500</span>&#160;    <span class="keywordtype">float</span> recons1[<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>];</div>
<div class="line"><a name="l01501"></a><span class="lineno"> 1501</span>&#160;    FAISS_THROW_IF_NOT (i0 &gt;= 0 &amp;&amp; i0 + ni &lt;= <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>);</div>
<div class="line"><a name="l01502"></a><span class="lineno"> 1502</span>&#160;    <span class="keyword">const</span> uint8_t *rp = &amp;codes[i0 * <a class="code" href="structfaiss_1_1Index2Layer.html#a66403863c8ec987ed83b4d7ef4064fe9">code_size</a>];</div>
<div class="line"><a name="l01503"></a><span class="lineno"> 1503</span>&#160;</div>
<div class="line"><a name="l01504"></a><span class="lineno"> 1504</span>&#160;    <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i = 0; i &lt; ni; i++) {</div>
<div class="line"><a name="l01505"></a><span class="lineno"> 1505</span>&#160;        <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> key = 0;</div>
<div class="line"><a name="l01506"></a><span class="lineno"> 1506</span>&#160;        memcpy (&amp;key, rp, <a class="code" href="structfaiss_1_1Index2Layer.html#a735b2b6cc50e4186776a8213d2679837">code_size_1</a>);</div>
<div class="line"><a name="l01507"></a><span class="lineno"> 1507</span>&#160;        <a class="code" href="structfaiss_1_1Index2Layer.html#a5f2d70740af90b8c7ac946d58ec947aa">q1</a>.<a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#aaef6f4132b1f390121ebb11058baf190">reconstruct</a> (key, recons1);</div>
<div class="line"><a name="l01508"></a><span class="lineno"> 1508</span>&#160;        rp += <a class="code" href="structfaiss_1_1Index2Layer.html#a735b2b6cc50e4186776a8213d2679837">code_size_1</a>;</div>
<div class="line"><a name="l01509"></a><span class="lineno"> 1509</span>&#160;        <a class="code" href="structfaiss_1_1Index2Layer.html#ab90d1de73cbc705a347cfc852ded6006">pq</a>.<a class="code" href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">decode</a> (rp, recons);</div>
<div class="line"><a name="l01510"></a><span class="lineno"> 1510</span>&#160;        <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> j = 0; j &lt; <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>; j++) {</div>
<div class="line"><a name="l01511"></a><span class="lineno"> 1511</span>&#160;            recons[j] += recons1[j];</div>
<div class="line"><a name="l01512"></a><span class="lineno"> 1512</span>&#160;        }</div>
<div class="line"><a name="l01513"></a><span class="lineno"> 1513</span>&#160;        rp += <a class="code" href="structfaiss_1_1Index2Layer.html#ad47e3c6493d54c2b83f1120b480d20f3">code_size_2</a>;</div>
<div class="line"><a name="l01514"></a><span class="lineno"> 1514</span>&#160;        recons += <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l01515"></a><span class="lineno"> 1515</span>&#160;    }</div>
<div class="line"><a name="l01516"></a><span class="lineno"> 1516</span>&#160;}</div>
<div class="line"><a name="l01517"></a><span class="lineno"> 1517</span>&#160;</div>
<div class="line"><a name="l01518"></a><span class="lineno"><a class="line" href="structfaiss_1_1Index2Layer.html#a8692273ff51ab7f34748c3d5b3295216"> 1518</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1Index2Layer.html#a8692273ff51ab7f34748c3d5b3295216">Index2Layer::transfer_to_IVFPQ</a> (<a class="code" href="structfaiss_1_1IndexIVFPQ.html">IndexIVFPQ</a> &amp; other)<span class="keyword"> const</span></div>
<div class="line"><a name="l01519"></a><span class="lineno"> 1519</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l01520"></a><span class="lineno"> 1520</span>&#160;    FAISS_THROW_IF_NOT (other.<a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a> == <a class="code" href="structfaiss_1_1Index2Layer.html#a5f2d70740af90b8c7ac946d58ec947aa">q1</a>.<a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>);</div>
<div class="line"><a name="l01521"></a><span class="lineno"> 1521</span>&#160;    FAISS_THROW_IF_NOT (other.<a class="code" href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">code_size</a> == <a class="code" href="structfaiss_1_1Index2Layer.html#ad47e3c6493d54c2b83f1120b480d20f3">code_size_2</a>);</div>
<div class="line"><a name="l01522"></a><span class="lineno"> 1522</span>&#160;    FAISS_THROW_IF_NOT (other.<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> == 0);</div>
<div class="line"><a name="l01523"></a><span class="lineno"> 1523</span>&#160;</div>
<div class="line"><a name="l01524"></a><span class="lineno"> 1524</span>&#160;    <span class="keyword">const</span> uint8_t *rp = codes.data();</div>
<div class="line"><a name="l01525"></a><span class="lineno"> 1525</span>&#160;</div>
<div class="line"><a name="l01526"></a><span class="lineno"> 1526</span>&#160;    <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i = 0; i &lt; <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>; i++) {</div>
<div class="line"><a name="l01527"></a><span class="lineno"> 1527</span>&#160;        <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> key = 0;</div>
<div class="line"><a name="l01528"></a><span class="lineno"> 1528</span>&#160;        memcpy (&amp;key, rp, <a class="code" href="structfaiss_1_1Index2Layer.html#a735b2b6cc50e4186776a8213d2679837">code_size_1</a>);</div>
<div class="line"><a name="l01529"></a><span class="lineno"> 1529</span>&#160;        rp += <a class="code" href="structfaiss_1_1Index2Layer.html#a735b2b6cc50e4186776a8213d2679837">code_size_1</a>;</div>
<div class="line"><a name="l01530"></a><span class="lineno"> 1530</span>&#160;        other.<a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#acd3e36cc06fc49e02773e403a84dba95">add_entry</a> (key, i, rp);</div>
<div class="line"><a name="l01531"></a><span class="lineno"> 1531</span>&#160;        rp += <a class="code" href="structfaiss_1_1Index2Layer.html#ad47e3c6493d54c2b83f1120b480d20f3">code_size_2</a>;</div>
<div class="line"><a name="l01532"></a><span class="lineno"> 1532</span>&#160;    }</div>
<div class="line"><a name="l01533"></a><span class="lineno"> 1533</span>&#160;</div>
<div class="line"><a name="l01534"></a><span class="lineno"> 1534</span>&#160;    other.<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> = <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>;</div>
<div class="line"><a name="l01535"></a><span class="lineno"> 1535</span>&#160;</div>
<div class="line"><a name="l01536"></a><span class="lineno"> 1536</span>&#160;}</div>
<div class="line"><a name="l01537"></a><span class="lineno"> 1537</span>&#160;</div>
<div class="line"><a name="l01538"></a><span class="lineno"> 1538</span>&#160;</div>
<div class="line"><a name="l01539"></a><span class="lineno"> 1539</span>&#160;</div>
<div class="line"><a name="l01540"></a><span class="lineno"><a class="line" href="structfaiss_1_1Index2Layer.html#af2e505c14e62234eb251fcb37ef012d2"> 1540</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1Index2Layer.html#af2e505c14e62234eb251fcb37ef012d2">Index2Layer::reconstruct</a>(<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> key, <span class="keywordtype">float</span>* recons)<span class="keyword"> const</span></div>
<div class="line"><a name="l01541"></a><span class="lineno"> 1541</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l01542"></a><span class="lineno"> 1542</span>&#160;    <a class="code" href="structfaiss_1_1Index2Layer.html#a226daedaa05c0e0bb3a0afb78d5aa120">reconstruct_n</a> (key, 1, recons);</div>
<div class="line"><a name="l01543"></a><span class="lineno"> 1543</span>&#160;}</div>
<div class="line"><a name="l01544"></a><span class="lineno"> 1544</span>&#160;</div>
<div class="line"><a name="l01545"></a><span class="lineno"><a class="line" href="structfaiss_1_1Index2Layer.html#a12e446dbca14688c37e038c98972ef4e"> 1545</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1Index2Layer.html#a12e446dbca14688c37e038c98972ef4e">Index2Layer::reset</a>()</div>
<div class="line"><a name="l01546"></a><span class="lineno"> 1546</span>&#160;{</div>
<div class="line"><a name="l01547"></a><span class="lineno"> 1547</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> = 0;</div>
<div class="line"><a name="l01548"></a><span class="lineno"> 1548</span>&#160;    codes.clear ();</div>
<div class="line"><a name="l01549"></a><span class="lineno"> 1549</span>&#160;}</div>
<div class="line"><a name="l01550"></a><span class="lineno"> 1550</span>&#160;</div>
<div class="line"><a name="l01551"></a><span class="lineno"> 1551</span>&#160;</div>
<div class="line"><a name="l01552"></a><span class="lineno"> 1552</span>&#160;} <span class="comment">// namespace faiss</span></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00090">IndexIVF.h:90</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_ad99c215aeaf92e995cb97f4044c4d267"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#ad99c215aeaf92e995cb97f4044c4d267">faiss::IndexIVFPQ::precompute_table</a></div><div class="ttdeci">void precompute_table()</div><div class="ttdoc">build precomputed table </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00363">IndexIVFPQ.cpp:363</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a31a1fec2a88b410ea96ce5be7d527be9"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a31a1fec2a88b410ea96ce5be7d527be9">faiss::IndexIVFPQR::merge_from</a></div><div class="ttdeci">void merge_from(IndexIVF &amp;other, idx_t add_id) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01353">IndexIVFPQ.cpp:1353</a></div></div>
<div class="ttc" id="structfaiss_1_1Index2Layer_html_a8692273ff51ab7f34748c3d5b3295216"><div class="ttname"><a href="structfaiss_1_1Index2Layer.html#a8692273ff51ab7f34748c3d5b3295216">faiss::Index2Layer::transfer_to_IVFPQ</a></div><div class="ttdeci">void transfer_to_IVFPQ(IndexIVFPQ &amp;other) const </div><div class="ttdoc">transfer the flat codes to an IVFPQ index </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01518">IndexIVFPQ.cpp:1518</a></div></div>
<div class="ttc" id="structfaiss_1_1Index2Layer_html_ad47e3c6493d54c2b83f1120b480d20f3"><div class="ttname"><a href="structfaiss_1_1Index2Layer.html#ad47e3c6493d54c2b83f1120b480d20f3">faiss::Index2Layer::code_size_2</a></div><div class="ttdeci">size_t code_size_2</div><div class="ttdoc">size of the code for the second level </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00218">IndexIVFPQ.h:218</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a83aa33ae77eb80f6564992e250abcf41"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a83aa33ae77eb80f6564992e250abcf41">faiss::IndexIVFPQR::reconstruct_from_offset</a></div><div class="ttdeci">void reconstruct_from_offset(long list_no, long offset, float *recons) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01338">IndexIVFPQ.cpp:1338</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a7cf3a1963394f87d61913420a66eb468"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a7cf3a1963394f87d61913420a66eb468">faiss::IndexIVF::search_preassigned</a></div><div class="ttdeci">virtual void search_preassigned(idx_t n, const float *x, idx_t k, const idx_t *assign, const float *centroid_dis, float *distances, idx_t *labels, bool store_pairs, const IVFSearchParameters *params=nullptr) const </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00250">IndexIVF.cpp:250</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html">faiss::IndexIVFPQR</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00155">IndexIVFPQ.h:155</a></div></div>
<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_a7afbf9d96276f021981e99f064254208"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#a7afbf9d96276f021981e99f064254208">faiss::ProductQuantizer::decode</a></div><div class="ttdeci">void decode(const uint8_t *code, float *x) const </div><div class="ttdoc">decode a vector from a given code (or n vectors if third argument) </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8cpp_source.html#l00380">ProductQuantizer.cpp:380</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a4a80540e7cdfb3e43712ffb93e083a7c"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a4a80540e7cdfb3e43712ffb93e083a7c">faiss::IndexIVFPQR::refine_pq</a></div><div class="ttdeci">ProductQuantizer refine_pq</div><div class="ttdoc">3rd level quantizer </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00156">IndexIVFPQ.h:156</a></div></div>
<div class="ttc" id="namespacefaiss_html_a7466bd32de31640860393a701eaac5ad"><div class="ttname"><a href="namespacefaiss.html#a7466bd32de31640860393a701eaac5ad">faiss::fvec_L2sqr</a></div><div class="ttdeci">float fvec_L2sqr(const float *x, const float *y, size_t d)</div><div class="ttdoc">Squared L2 distance between two vectors. </div><div class="ttdef"><b>Definition:</b> <a href="utils__simd_8cpp_source.html#l00501">utils_simd.cpp:501</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a2b14cbb5acb3fc28a4df8fde3f5567cd"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a2b14cbb5acb3fc28a4df8fde3f5567cd">faiss::IndexIVFPQ::polysemous_training</a></div><div class="ttdeci">PolysemousTraining * polysemous_training</div><div class="ttdoc">if NULL, use default </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00040">IndexIVFPQ.h:40</a></div></div>
<div class="ttc" id="structfaiss_1_1Index2Layer_html_a226daedaa05c0e0bb3a0afb78d5aa120"><div class="ttname"><a href="structfaiss_1_1Index2Layer.html#a226daedaa05c0e0bb3a0afb78d5aa120">faiss::Index2Layer::reconstruct_n</a></div><div class="ttdeci">void reconstruct_n(idx_t i0, idx_t ni, float *recons) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01498">IndexIVFPQ.cpp:1498</a></div></div>
<div class="ttc" id="structfaiss_1_1Index2Layer_html_a66403863c8ec987ed83b4d7ef4064fe9"><div class="ttname"><a href="structfaiss_1_1Index2Layer.html#a66403863c8ec987ed83b4d7ef4064fe9">faiss::Index2Layer::code_size</a></div><div class="ttdeci">size_t code_size</div><div class="ttdoc">code_size_1 + code_size_2 </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00221">IndexIVFPQ.h:221</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQStats_html"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQStats.html">faiss::IndexIVFPQStats</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00134">IndexIVFPQ.h:134</a></div></div>
<div class="ttc" id="namespacefaiss_html_a14884d253128c7af5891a65082ad7dc6"><div class="ttname"><a href="namespacefaiss.html#a14884d253128c7af5891a65082ad7dc6">faiss::fvecs_maybe_subsample</a></div><div class="ttdeci">const float * fvecs_maybe_subsample(size_t d, size_t *n, size_t nmax, const float *x, bool verbose, long seed)</div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l01540">utils.cpp:1540</a></div></div>
<div class="ttc" id="structfaiss_1_1Index2Layer_html_a12e446dbca14688c37e038c98972ef4e"><div class="ttname"><a href="structfaiss_1_1Index2Layer.html#a12e446dbca14688c37e038c98972ef4e">faiss::Index2Layer::reset</a></div><div class="ttdeci">void reset() override</div><div class="ttdoc">removes all elements from the database. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01545">IndexIVFPQ.cpp:1545</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c"><div class="ttname"><a href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">faiss::Index::assign</a></div><div class="ttdeci">void assign(idx_t n, const float *x, idx_t *labels, idx_t k=1)</div><div class="ttdef"><b>Definition:</b> <a href="Index_8cpp_source.html#l00034">Index.cpp:34</a></div></div>
<div class="ttc" id="structfaiss_1_1IDSelector_html"><div class="ttname"><a href="structfaiss_1_1IDSelector.html">faiss::IDSelector</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00054">AuxIndexStructures.h:54</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_html_a9bd256053ee360473842105460fe285f"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#a9bd256053ee360473842105460fe285f">faiss::InvertedLists::list_size</a></div><div class="ttdeci">virtual size_t list_size(size_t list_no) const =0</div><div class="ttdoc">get the size of a list </div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_ae1fb0cc3051dec8e322a78c443f8fc9a"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#ae1fb0cc3051dec8e322a78c443f8fc9a">faiss::IndexIVFPQ::decode_multiple</a></div><div class="ttdeci">void decode_multiple(size_t n, const long *keys, const uint8_t *xcodes, float *x) const </div><div class="ttdoc">inverse of encode_multiple </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00159">IndexIVFPQ.cpp:159</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a4e06f04853dcb424dc393de5f641e917"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a4e06f04853dcb424dc393de5f641e917">faiss::IndexIVFPQ::train_residual_o</a></div><div class="ttdeci">void train_residual_o(idx_t n, const float *x, float *residuals_2)</div><div class="ttdoc">same as train_residual, also output 2nd level residuals </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00066">IndexIVFPQ.cpp:66</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a9d5373633df7a9bec4de69400b9adeed"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a9d5373633df7a9bec4de69400b9adeed">faiss::IndexIVFPQ::do_polysemous_training</a></div><div class="ttdeci">bool do_polysemous_training</div><div class="ttdoc">reorder PQ centroids after training? </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00039">IndexIVFPQ.h:39</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a7430fc4fa030c96497abced3b68358d4"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a7430fc4fa030c96497abced3b68358d4">faiss::IndexIVFPQ::scan_table_threshold</a></div><div class="ttdeci">size_t scan_table_threshold</div><div class="ttdoc">use table computation or on-the-fly? </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00043">IndexIVFPQ.h:43</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a68ed7cae5bec89fcdcb6a1d2addbd5a8"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a68ed7cae5bec89fcdcb6a1d2addbd5a8">faiss::IndexIVFPQR::train_residual</a></div><div class="ttdeci">void train_residual(idx_t n, const float *x) override</div><div class="ttdoc">trains the two product quantizers </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01207">IndexIVFPQ.cpp:1207</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a186b746f22b65ddf416b1e821b0866ec"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a186b746f22b65ddf416b1e821b0866ec">faiss::IndexIVFPQR::add_core</a></div><div class="ttdeci">void add_core(idx_t n, const float *x, const long *xids, const long *precomputed_idx=nullptr)</div><div class="ttdoc">same as add_with_ids, but optionally use the precomputed list ids </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01231">IndexIVFPQ.cpp:1231</a></div></div>
<div class="ttc" id="structfaiss_1_1ScopeDeleter_html"><div class="ttname"><a href="structfaiss_1_1ScopeDeleter.html">faiss::ScopeDeleter</a></div><div class="ttdef"><b>Definition:</b> <a href="FaissException_8h_source.html#l00045">FaissException.h:45</a></div></div>
<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_a467b451ca203544e42c250e4be65b983"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#a467b451ca203544e42c250e4be65b983">faiss::ProductQuantizer::dsub</a></div><div class="ttdeci">size_t dsub</div><div class="ttdoc">dimensionality of each subvector </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00032">ProductQuantizer.h:32</a></div></div>
<div class="ttc" id="structfaiss_1_1ClusteringParameters_html_a509c65e2ebe6ecabebd163ecb03c5579"><div class="ttname"><a href="structfaiss_1_1ClusteringParameters.html#a509c65e2ebe6ecabebd163ecb03c5579">faiss::ClusteringParameters::seed</a></div><div class="ttdeci">int seed</div><div class="ttdoc">seed for the random number generator </div><div class="ttdef"><b>Definition:</b> <a href="Clustering_8h_source.html#l00035">Clustering.h:35</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a9b310195d610c3e326471b3758206b59"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a9b310195d610c3e326471b3758206b59">faiss::IndexIVFPQ::precomputed_table</a></div><div class="ttdeci">std::vector&lt; float &gt; precomputed_table</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00059">IndexIVFPQ.h:59</a></div></div>
<div class="ttc" id="structfaiss_1_1Index2Layer_html_a5f2d70740af90b8c7ac946d58ec947aa"><div class="ttname"><a href="structfaiss_1_1Index2Layer.html#a5f2d70740af90b8c7ac946d58ec947aa">faiss::Index2Layer::q1</a></div><div class="ttdeci">Level1Quantizer q1</div><div class="ttdoc">first level quantizer </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00206">IndexIVFPQ.h:206</a></div></div>
<div class="ttc" id="namespacefaiss_html_a40328c31abd0bbba5bd95d7de951e847"><div class="ttname"><a href="namespacefaiss.html#a40328c31abd0bbba5bd95d7de951e847">faiss::fvec_madd</a></div><div class="ttdeci">void fvec_madd(size_t n, const float *a, float bf, const float *b, float *c)</div><div class="ttdef"><b>Definition:</b> <a href="utils__simd_8cpp_source.html#l00588">utils_simd.cpp:588</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_aaeddd125680a8d5347c0b58565b6b511"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#aaeddd125680a8d5347c0b58565b6b511">faiss::IndexIVFPQ::encode_vectors</a></div><div class="ttdeci">void encode_vectors(idx_t n, const float *x, const idx_t *list_nos, uint8_t *codes) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00206">IndexIVFPQ.cpp:206</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a3093a0a3e128eafce6e0583b75e9662e"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a3093a0a3e128eafce6e0583b75e9662e">faiss::IndexIVFPQ::polysemous_ht</a></div><div class="ttdeci">int polysemous_ht</div><div class="ttdoc">Hamming thresh for polysemous filtering. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00044">IndexIVFPQ.h:44</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a694b699dd3512d83743d717e489bd48c"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a694b699dd3512d83743d717e489bd48c">faiss::IndexIVFPQ::get_InvertedListScanner</a></div><div class="ttdeci">InvertedListScanner * get_InvertedListScanner(bool store_pairs) const override</div><div class="ttdoc">get a scanner for this index (store_pairs means ignore labels) </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01094">IndexIVFPQ.cpp:1094</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_ae0e979a014a9defe2254e9543657b075"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#ae0e979a014a9defe2254e9543657b075">faiss::IndexIVFPQR::reset</a></div><div class="ttdeci">void reset() override</div><div class="ttdoc">removes all elements from the database. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01198">IndexIVFPQ.cpp:1198</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a981c2748bfbd9b018494f119279a0342"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a981c2748bfbd9b018494f119279a0342">faiss::IndexIVFPQ::add_with_ids</a></div><div class="ttdeci">void add_with_ids(idx_t n, const float *x, const long *xids=nullptr) override</div><div class="ttdoc">default implementation that calls encode_vectors </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00182">IndexIVFPQ.cpp:182</a></div></div>
<div class="ttc" id="structfaiss_1_1IVFSearchParameters_html"><div class="ttname"><a href="structfaiss_1_1IVFSearchParameters.html">faiss::IVFSearchParameters</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00060">IndexIVF.h:60</a></div></div>
<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_ae5a340ee5a4b1d35a565b167de2a2ef1"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#ae5a340ee5a4b1d35a565b167de2a2ef1">faiss::ProductQuantizer::compute_codes</a></div><div class="ttdeci">void compute_codes(const float *x, uint8_t *codes, size_t n) const </div><div class="ttdoc">same as compute_code for several vectors </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8cpp_source.html#l00482">ProductQuantizer.cpp:482</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_html_a21b52cdb0601cd225bd7924932310876"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#a21b52cdb0601cd225bd7924932310876">faiss::InvertedLists::get_single_id</a></div><div class="ttdeci">virtual idx_t get_single_id(size_t list_no, size_t offset) const </div><div class="ttdef"><b>Definition:</b> <a href="InvertedLists_8cpp_source.html#l00035">InvertedLists.cpp:35</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a2a002388d2c081c2dbab8508dcefe73d"><div class="ttname"><a href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">faiss::Index::d</a></div><div class="ttdeci">int d</div><div class="ttdoc">vector dimension </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00066">Index.h:66</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_ad3f0d3071f987baabbdd3da4500c87ea"><div class="ttname"><a href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">faiss::Index::idx_t</a></div><div class="ttdeci">long idx_t</div><div class="ttdoc">all indices are this type </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00062">Index.h:62</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_html_ae06049e4259edb47d443ef87bdedc744"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#ae06049e4259edb47d443ef87bdedc744">faiss::InvertedLists::code_size</a></div><div class="ttdeci">size_t code_size</div><div class="ttdoc">code size per vector in bytes </div><div class="ttdef"><b>Definition:</b> <a href="InvertedLists_8h_source.html#l00035">InvertedLists.h:35</a></div></div>
<div class="ttc" id="structfaiss_1_1CodeCmp_html"><div class="ttname"><a href="structfaiss_1_1CodeCmp.html">faiss::CodeCmp</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01128">IndexIVFPQ.cpp:1128</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_html_afc2760bed7c210f2fad9b03109f561ee"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#afc2760bed7c210f2fad9b03109f561ee">faiss::InvertedLists::get_single_code</a></div><div class="ttdeci">virtual const uint8_t * get_single_code(size_t list_no, size_t offset) const </div><div class="ttdef"><b>Definition:</b> <a href="InvertedLists_8cpp_source.html#l00052">InvertedLists.cpp:52</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a588bd0b733c8db18eaeb7bc287afd16e"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a588bd0b733c8db18eaeb7bc287afd16e">faiss::IndexIVFPQR::refine_codes</a></div><div class="ttdeci">std::vector&lt; uint8_t &gt; refine_codes</div><div class="ttdoc">corresponding codes </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00157">IndexIVFPQ.h:157</a></div></div>
<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_aa61330eadb84772b71018b093773a5f9"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#aa61330eadb84772b71018b093773a5f9">faiss::ProductQuantizer::code_size</a></div><div class="ttdeci">size_t code_size</div><div class="ttdoc">byte per indexed vector </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00033">ProductQuantizer.h:33</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_af6565a5d8bab7be3df19c50d235bd662"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#af6565a5d8bab7be3df19c50d235bd662">faiss::IndexIVFPQ::train_residual</a></div><div class="ttdeci">void train_residual(idx_t n, const float *x) override</div><div class="ttdoc">trains the product quantizer </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00060">IndexIVFPQ.cpp:60</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a823ae6c4131996815fa4e90c7d1d13f6"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a823ae6c4131996815fa4e90c7d1d13f6">faiss::IndexIVFPQ::precomputed_table_max_bytes</a></div><div class="ttdeci">static size_t precomputed_table_max_bytes</div><div class="ttdoc">2G by default, accommodates tables up to PQ32 w/ 65536 centroids </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00055">IndexIVFPQ.h:55</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a921c6640d3a16bb3608883d8e8948810"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a921c6640d3a16bb3608883d8e8948810">faiss::IndexIVFPQ::reconstruct_from_offset</a></div><div class="ttdeci">void reconstruct_from_offset(long list_no, long offset, float *recons) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00310">IndexIVFPQ.cpp:310</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html">faiss::IndexIVFPQ</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00034">IndexIVFPQ.h:34</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a1ae6cdd996bbd398fa4e87646c8f3ba6"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a1ae6cdd996bbd398fa4e87646c8f3ba6">faiss::IndexIVFPQ::encode_multiple</a></div><div class="ttdeci">void encode_multiple(size_t n, long *keys, const float *x, uint8_t *codes, bool compute_keys=false) const </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00149">IndexIVFPQ.cpp:149</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_html_acd3e36cc06fc49e02773e403a84dba95"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#acd3e36cc06fc49e02773e403a84dba95">faiss::InvertedLists::add_entry</a></div><div class="ttdeci">virtual size_t add_entry(size_t list_no, idx_t theid, const uint8_t *code)</div><div class="ttdoc">add one entry to an inverted list </div><div class="ttdef"><b>Definition:</b> <a href="InvertedLists_8cpp_source.html#l00059">InvertedLists.cpp:59</a></div></div>
<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_a0feee45e4151547b7a0444c14bad398f"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#a0feee45e4151547b7a0444c14bad398f">faiss::ProductQuantizer::ksub</a></div><div class="ttdeci">size_t ksub</div><div class="ttdoc">number of centroids for each subquantizer </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00034">ProductQuantizer.h:34</a></div></div>
<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_a08b130e3a21f2699a4e3bbec121fb838"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#a08b130e3a21f2699a4e3bbec121fb838">faiss::ProductQuantizer::compute_code</a></div><div class="ttdeci">void compute_code(const float *x, uint8_t *code) const </div><div class="ttdoc">Quantize one vector with the product quantizer. </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8cpp_source.html#l00354">ProductQuantizer.cpp:354</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a6970683faa021b7a6f1a0865c0d4eccd"><div class="ttname"><a href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">faiss::Index::ntotal</a></div><div class="ttdeci">idx_t ntotal</div><div class="ttdoc">total nb of indexed vectors </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00067">Index.h:67</a></div></div>
<div class="ttc" id="structfaiss_1_1Index2Layer_html_a48cbf519590313f1c6a3dc89c8d0678c"><div class="ttname"><a href="structfaiss_1_1Index2Layer.html#a48cbf519590313f1c6a3dc89c8d0678c">faiss::Index2Layer::train</a></div><div class="ttdeci">void train(idx_t n, const float *x) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01402">IndexIVFPQ.cpp:1402</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a5590d847c5c2b958affd2a05e58a6f23"><div class="ttname"><a href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">faiss::Index::verbose</a></div><div class="ttdeci">bool verbose</div><div class="ttdoc">verbosity level </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00068">Index.h:68</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a47a3b7665e9d2be41c6d3b2e9144b73f"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a47a3b7665e9d2be41c6d3b2e9144b73f">faiss::IndexIVF::reset</a></div><div class="ttdeci">void reset() override</div><div class="ttdoc">removes all elements from the database. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00640">IndexIVF.cpp:640</a></div></div>
<div class="ttc" id="namespacefaiss_html_af2a71f7d5402ae02ce169a4cc83020eb"><div class="ttname"><a href="namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb">faiss::getmillisecs</a></div><div class="ttdeci">double getmillisecs()</div><div class="ttdoc">ms elapsed since some arbitrary epoch </div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l00069">utils.cpp:69</a></div></div>
<div class="ttc" id="structfaiss_1_1PolysemousTraining_html"><div class="ttname"><a href="structfaiss_1_1PolysemousTraining.html">faiss::PolysemousTraining</a></div><div class="ttdoc">optimizes the order of indices in a ProductQuantizer </div><div class="ttdef"><b>Definition:</b> <a href="PolysemousTraining_8h_source.html#l00121">PolysemousTraining.h:121</a></div></div>
<div class="ttc" id="structfaiss_1_1Index2Layer_html_a0aa69e64a2b216a01f99366e8ca4dc7b"><div class="ttname"><a href="structfaiss_1_1Index2Layer.html#a0aa69e64a2b216a01f99366e8ca4dc7b">faiss::Index2Layer::add</a></div><div class="ttdeci">void add(idx_t n, const float *x) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01440">IndexIVFPQ.cpp:1440</a></div></div>
<div class="ttc" id="structfaiss_1_1MultiIndexQuantizer_html"><div class="ttname"><a href="structfaiss_1_1MultiIndexQuantizer.html">faiss::MultiIndexQuantizer</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexPQ_8h_source.html#l00135">IndexPQ.h:135</a></div></div>
<div class="ttc" id="namespacefaiss_html_a7a49180ebf10e643217bbce5862c7f84"><div class="ttname"><a href="namespacefaiss.html#a7a49180ebf10e643217bbce5862c7f84">faiss::fvec_norm_L2sqr</a></div><div class="ttdeci">float fvec_norm_L2sqr(const float *x, size_t d)</div><div class="ttdef"><b>Definition:</b> <a href="utils__simd_8cpp_source.html#l00515">utils_simd.cpp:515</a></div></div>
<div class="ttc" id="structfaiss_1_1Level1Quantizer_html_a0069a6ee1e32c2e0c1c7df9a95740dd4"><div class="ttname"><a href="structfaiss_1_1Level1Quantizer.html#a0069a6ee1e32c2e0c1c7df9a95740dd4">faiss::Level1Quantizer::train_q1</a></div><div class="ttdeci">void train_q1(size_t n, const float *x, bool verbose, MetricType metric_type)</div><div class="ttdoc">Trains the quantizer and calls train_residual to train sub-quantizers. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00060">IndexIVF.cpp:60</a></div></div>
<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_af265acf5aa1bcda60898002287e6a3d6"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#af265acf5aa1bcda60898002287e6a3d6">faiss::ProductQuantizer::cp</a></div><div class="ttdeci">ClusteringParameters cp</div><div class="ttdoc">parameters used during clustering </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00048">ProductQuantizer.h:48</a></div></div>
<div class="ttc" id="structfaiss_1_1Index2Layer_html_a5961efc2e19d9a6e5224f477b6d1b226"><div class="ttname"><a href="structfaiss_1_1Index2Layer.html#a5961efc2e19d9a6e5224f477b6d1b226">faiss::Index2Layer::search</a></div><div class="ttdeci">void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const override</div><div class="ttdoc">not implemented </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01488">IndexIVFPQ.cpp:1488</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_afd13b471df293ae5a6e895704c69a4c3"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">faiss::IndexIVFPQ::by_residual</a></div><div class="ttdeci">bool by_residual</div><div class="ttdoc">Encode residual or plain vector? </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00035">IndexIVFPQ.h:35</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a8e18f641854b2bde83ecff0a2f9a6f4e"><div class="ttname"><a href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">faiss::Index::metric_type</a></div><div class="ttdeci">MetricType metric_type</div><div class="ttdoc">type of metric this index uses for search </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00074">Index.h:74</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a007303be116c8da65b6d058e3fc77d16"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">faiss::IndexIVFPQ::pq</a></div><div class="ttdeci">ProductQuantizer pq</div><div class="ttdoc">produces the codes </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00037">IndexIVFPQ.h:37</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_aa0e8fc5e04cbd8e0dde61f98bc7dd0bc"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">faiss::IndexIVF::invlists</a></div><div class="ttdeci">InvertedLists * invlists</div><div class="ttdoc">Acess to the actual data. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00092">IndexIVF.h:92</a></div></div>
<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_a83600e328893ce5f41fe459f5a3acf41"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#a83600e328893ce5f41fe459f5a3acf41">faiss::ProductQuantizer::M</a></div><div class="ttdeci">size_t M</div><div class="ttdoc">number of subquantizers </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00028">ProductQuantizer.h:28</a></div></div>
<div class="ttc" id="structfaiss_1_1Index2Layer_html_a735b2b6cc50e4186776a8213d2679837"><div class="ttname"><a href="structfaiss_1_1Index2Layer.html#a735b2b6cc50e4186776a8213d2679837">faiss::Index2Layer::code_size_1</a></div><div class="ttdeci">size_t code_size_1</div><div class="ttdoc">size of the code for the first level (ceil(log8(q1.nlist))) </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00215">IndexIVFPQ.h:215</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html"><div class="ttname"><a href="structfaiss_1_1Index.html">faiss::Index</a></div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00061">Index.h:61</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_ac0cb8421b9885d691696d2ff4f76894b"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#ac0cb8421b9885d691696d2ff4f76894b">faiss::IndexIVFPQ::add_core_o</a></div><div class="ttdeci">void add_core_o(idx_t n, const float *x, const long *xids, float *residuals_2, const long *precomputed_idx=nullptr)</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l00220">IndexIVFPQ.cpp:220</a></div></div>
<div class="ttc" id="namespacefaiss_html_a9da63b8bb84460f5e8ccf8e17622cc7a"><div class="ttname"><a href="namespacefaiss.html#a9da63b8bb84460f5e8ccf8e17622cc7a">faiss::fvec_madd_and_argmin</a></div><div class="ttdeci">int fvec_madd_and_argmin(size_t n, const float *a, float bf, const float *b, float *c)</div><div class="ttdef"><b>Definition:</b> <a href="utils__simd_8cpp_source.html#l00675">utils_simd.cpp:675</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_ab9daed04d3cb3f7f57f32c6b477ac5b3"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#ab9daed04d3cb3f7f57f32c6b477ac5b3">faiss::IndexIVFPQR::search_preassigned</a></div><div class="ttdeci">void search_preassigned(idx_t n, const float *x, idx_t k, const idx_t *assign, const float *centroid_dis, float *distances, idx_t *labels, bool store_pairs, const IVFSearchParameters *params=nullptr) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01250">IndexIVFPQ.cpp:1250</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_acc5eeeeb8ac8d2581ef07947932d9f6c"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#acc5eeeeb8ac8d2581ef07947932d9f6c">faiss::IndexIVFPQR::remove_ids</a></div><div class="ttdeci">long remove_ids(const IDSelector &amp;sel) override</div><div class="ttdoc">Dataset manipulation functions. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01366">IndexIVFPQ.cpp:1366</a></div></div>
<div class="ttc" id="structfaiss_1_1Level1Quantizer_html_a3cf99e2ee92b8558a066f821efab95d5"><div class="ttname"><a href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">faiss::Level1Quantizer::quantizer</a></div><div class="ttdeci">Index * quantizer</div><div class="ttdoc">quantizer that maps vectors to inverted lists </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00032">IndexIVF.h:32</a></div></div>
<div class="ttc" id="structfaiss_1_1ProductQuantizer_html"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html">faiss::ProductQuantizer</a></div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00023">ProductQuantizer.h:23</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a6e92732617c4dbe364e7678dd8773a7f"><div class="ttname"><a href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">faiss::Index::is_trained</a></div><div class="ttdeci">bool is_trained</div><div class="ttdoc">set if the Index does not require training, or if training is done already </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00071">Index.h:71</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_aaae77608bbda70b1098897e9167a82f9"><div class="ttname"><a href="structfaiss_1_1Index.html#aaae77608bbda70b1098897e9167a82f9">faiss::Index::compute_residual</a></div><div class="ttdeci">void compute_residual(const float *x, float *residual, idx_t key) const </div><div class="ttdef"><b>Definition:</b> <a href="Index_8cpp_source.html#l00086">Index.cpp:86</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_1_1ScopedIds_html"><div class="ttname"><a href="structfaiss_1_1InvertedLists_1_1ScopedIds.html">faiss::InvertedLists::ScopedIds</a></div><div class="ttdef"><b>Definition:</b> <a href="InvertedLists_8h_source.html#l00136">InvertedLists.h:136</a></div></div>
<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_a4f0f33c011dffe633a1748a48a082c22"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#a4f0f33c011dffe633a1748a48a082c22">faiss::ProductQuantizer::get_centroids</a></div><div class="ttdeci">float * get_centroids(size_t m, size_t i)</div><div class="ttdoc">return the centroids associated with subvector m </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00058">ProductQuantizer.h:58</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_aaef6f4132b1f390121ebb11058baf190"><div class="ttname"><a href="structfaiss_1_1Index.html#aaef6f4132b1f390121ebb11058baf190">faiss::Index::reconstruct</a></div><div class="ttdeci">virtual void reconstruct(idx_t key, float *recons) const </div><div class="ttdef"><b>Definition:</b> <a href="Index_8cpp_source.html#l00054">Index.cpp:54</a></div></div>
<div class="ttc" id="structfaiss_1_1Index2Layer_html_ab90d1de73cbc705a347cfc852ded6006"><div class="ttname"><a href="structfaiss_1_1Index2Layer.html#ab90d1de73cbc705a347cfc852ded6006">faiss::Index2Layer::pq</a></div><div class="ttdeci">ProductQuantizer pq</div><div class="ttdoc">second level quantizer is always a PQ </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00209">IndexIVFPQ.h:209</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_aedd0c14b5654295b291638ec7f9f9517"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">faiss::IndexIVF::maintain_direct_map</a></div><div class="ttdeci">bool maintain_direct_map</div><div class="ttdoc">map for direct access to the elements. Enables reconstruct(). </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00109">IndexIVF.h:109</a></div></div>
<div class="ttc" id="structfaiss_1_1PolysemousTraining_html_a995374ba2f0bc2738edae72ca9142f82"><div class="ttname"><a href="structfaiss_1_1PolysemousTraining.html#a995374ba2f0bc2738edae72ca9142f82">faiss::PolysemousTraining::optimize_pq_for_hamming</a></div><div class="ttdeci">void optimize_pq_for_hamming(ProductQuantizer &amp;pq, size_t n, const float *x) const </div><div class="ttdef"><b>Definition:</b> <a href="PolysemousTraining_8cpp_source.html#l00934">PolysemousTraining.cpp:934</a></div></div>
<div class="ttc" id="structfaiss_1_1ClusteringParameters_html_a993e0a035248faad6e292a5ef9af1953"><div class="ttname"><a href="structfaiss_1_1ClusteringParameters.html#a993e0a035248faad6e292a5ef9af1953">faiss::ClusteringParameters::max_points_per_centroid</a></div><div class="ttdeci">int max_points_per_centroid</div><div class="ttdoc">to limit size of dataset </div><div class="ttdef"><b>Definition:</b> <a href="Clustering_8h_source.html#l00033">Clustering.h:33</a></div></div>
<div class="ttc" id="structfaiss_1_1ProductQuantizer_html_a1e4056fa3938ed8c9fe701e90d94ad95"><div class="ttname"><a href="structfaiss_1_1ProductQuantizer.html#a1e4056fa3938ed8c9fe701e90d94ad95">faiss::ProductQuantizer::verbose</a></div><div class="ttdeci">bool verbose</div><div class="ttdoc">verbose during training? </div><div class="ttdef"><b>Definition:</b> <a href="ProductQuantizer_8h_source.html#l00035">ProductQuantizer.h:35</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a4b6154a5194d574d037ba78c137a2fa5"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a4b6154a5194d574d037ba78c137a2fa5">faiss::IndexIVFPQR::add_with_ids</a></div><div class="ttdeci">void add_with_ids(idx_t n, const float *x, const long *xids) override</div><div class="ttdoc">default implementation that calls encode_vectors </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01227">IndexIVFPQ.cpp:1227</a></div></div>
<div class="ttc" id="structfaiss_1_1Index2Layer_html_af2e505c14e62234eb251fcb37ef012d2"><div class="ttname"><a href="structfaiss_1_1Index2Layer.html#af2e505c14e62234eb251fcb37ef012d2">faiss::Index2Layer::reconstruct</a></div><div class="ttdeci">void reconstruct(idx_t key, float *recons) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01540">IndexIVFPQ.cpp:1540</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a0f22cc237c30c935df5b6560aecf8f01"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a0f22cc237c30c935df5b6560aecf8f01">faiss::IndexIVF::merge_from</a></div><div class="ttdeci">virtual void merge_from(IndexIVF &amp;other, idx_t add_id)</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00721">IndexIVF.cpp:721</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_1_1ScopedCodes_html"><div class="ttname"><a href="structfaiss_1_1InvertedLists_1_1ScopedCodes.html">faiss::InvertedLists::ScopedCodes</a></div><div class="ttdef"><b>Definition:</b> <a href="InvertedLists_8h_source.html#l00156">InvertedLists.h:156</a></div></div>
<div class="ttc" id="structfaiss_1_1Level1Quantizer_html_a1c4fc9d874d9492ee0ea27a5be388fa7"><div class="ttname"><a href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">faiss::Level1Quantizer::nlist</a></div><div class="ttdeci">size_t nlist</div><div class="ttdoc">number of possible key values </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00033">IndexIVF.h:33</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a46d1aeddb60643c5b3f096147c3e028f"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">faiss::IndexIVF::code_size</a></div><div class="ttdeci">size_t code_size</div><div class="ttdoc">code size per vector in bytes </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00095">IndexIVF.h:95</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_aee355b57acde203a3caed46a93e16a3c"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#aee355b57acde203a3caed46a93e16a3c">faiss::IndexIVFPQ::find_duplicates</a></div><div class="ttdeci">size_t find_duplicates(idx_t *ids, size_t *lims) const </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8cpp_source.html#l01141">IndexIVFPQ.cpp:1141</a></div></div>
<div class="ttc" id="namespacefaiss_html_afd12191c638da74760ff397cf319752c"><div class="ttname"><a href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">faiss::MetricType</a></div><div class="ttdeci">MetricType</div><div class="ttdoc">Some algorithms support both an inner product version and a L2 search version. </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00044">Index.h:44</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQR_html_a0b02a4151ceacc070352f8b15cc0ee0b"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQR.html#a0b02a4151ceacc070352f8b15cc0ee0b">faiss::IndexIVFPQR::k_factor</a></div><div class="ttdeci">float k_factor</div><div class="ttdoc">factor between k requested in search and the k requested from the IVFPQ </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00160">IndexIVFPQ.h:160</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFPQ_html_a1c66ff073c18a1edbe8444c24d870583"><div class="ttname"><a href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">faiss::IndexIVFPQ::use_precomputed_table</a></div><div class="ttdeci">int use_precomputed_table</div><div class="ttdoc">if by_residual, build precompute tables </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFPQ_8h_source.html#l00054">IndexIVFPQ.h:54</a></div></div>
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